Campus Alert Archive
UT Dallas

Phoned-in bomb threat prompts campus-wide evacuation; determined to be a hoax

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TXbomb threatemergency notificationhigh confidence
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Confirmed HoaxDetermined to be a hoax. The institutional response is documented because it reveals how the alert system performed under a perceived real threat.

On Tuesday afternoon, June 27, 2017, UT Dallas ordered a campus-wide evacuation of every building and parking garage after the university received a phoned-in bomb threat. The Comet Alert text and the university's Twitter account directed students, faculty, staff and visitors to leave all structures and remain in parking lots until further notice. The all-clear came roughly 40 minutes later, after police determined the threat was a hoax. UT Dallas Police said other campuses around the country received similar threats that day, suggesting it was part of a coordinated hoax wave.

Alerts
3
Response
—
Killed
0
Injured
0
Institution
The University of Texas at Dallas
Public R1 · TX
All UT Dallas cases →
~29,000 studentsComet Alert
Documented Timeline

Alert Sequence

3 messages in sequence · 3 verified verbatim

INITIAL ALERTSMS
Verified verbatimCBS Texas quoting the UT Dallas Comet Alert verbatim206 chars
All UTD faculty, staff, students and visitors need to immediately evacuate all buildings and parking garages on campus. Please go to UT Dallas parking lots and stay away from buildings until further notice.
Notable for instructing evacuation of both buildings AND parking garages, a rare combination, as most bomb-threat evacuations send people TO parking lots rather than away from garages
Sent at approximately 2:40 p.m. CDT according to NBC 5 Dallas-Fort Worth's contemporaneous reporting
The phrase 'stay away from buildings until further notice' implicitly acknowledges that the perimeter of the search zone is the building itself, not just the threatened area
UPDATETwitter/X
Verified verbatimUT Dallas official Twitter (@UT_Dallas)85 chars
We received a bomb threat and are working with UTDPD to make sure the campus is safe.
Posted to the university's main Twitter account rather than a dedicated alert handle, reflecting that in 2017 most universities did not yet have a separate alert-specific social account
The plain-language phrasing ('we received a bomb threat') contrasts with the Comet Alert SMS, which never used the word 'bomb'; UT Dallas appears to have segmented bluntness to Twitter and operational urgency to SMS
The tweet served as the public confirmation of why the evacuation was happening; the SMS alone did not state a cause
ALL CLEARSMS+40 min
Verified verbatimWFAA quoting the UT Dallas all-clear Comet Alert89 chars
UTDPD say bomb threat was a hoax. You may now enter the buildings and parking structures.
Sent approximately 40 minutes after the initial evacuation order, a relatively quick resolution
Explicitly characterized the threat as a 'hoax' in the all-clear
The brevity (89 characters) reflects how short evacuations can be when a threat is quickly determined non-credible, no search-by-building update needed
Message elements

How the first alert is built

To check this alert, Claude (an AI) read it in full 25 separate times, independently. Each read decided whether the message answers each of the six questions and gave a short reason. A final reviewer then weighed all 25 and wrote the plain-English verdict you see when you open a row. The score (for example 22/25) is how many reads agreed; the 25 individual reads are tucked underneath if you want to check them.

All UTD faculty, staff, students and visitors need to immediately evacuate all buildings and parking garages on campus. Please go to UT Dallas parking lots and stay away from buildings until further notice.

  • Sourceabsent1/25

    Final assessment

    Strong consensus that the source is absent; no sender tag or named authority appears, with one read counting the UTD/UT Dallas references as self-identification.

    Who is sending the alert and who is responding. People act faster on a message from a clearly identifiable, credible sender, such as a named department, the police, or a branded alert system, than on an anonymous notice. A branded signature counts.

    See all 25 individual reads
    1. absent: No sender tag or named authority appears in the text.
    2. absent: No branded signature, sender, or named authority appears in the text.
    3. absent: No sender tag, branded signature, or named authority appears in the text.
    4. absent: No branded signature or named authority appears, only references to UTD/UT Dallas as institution.
    5. absent: No sender, branded signature, or issuing authority is identified in the text.
    6. absent: No sender, branded signature, or agency is identified, only "UTD" affiliation in the audience.
    7. absent: No sender tag, university name, or named authority appears in the text.
    8. absent: No sender tag, university name, or named authority appears, only "UTD" as the place.
    9. present: "UT Dallas" and "UTD" naming themselves identify the institution as sender.
    10. absent: No sender, branded signature, or responding authority is named in the text.
    11. absent: No sender, branded signature, or named authority appears in the text.
    12. absent: No sender or branded signature appears; "UTD" names the place but no issuer is stated.
    13. absent: No sender tag, signature, or issuing authority is named in the text.
    14. absent: No sender tag, university name, or agency identifies who issued it.
    15. absent: No sender, signature, or named authority appears beyond reference to "UTD" buildings.
    16. absent: No sender, authority, or branded signature is identified in the text.
    17. absent: No sender, branded tag, or named agency appears in the text.
    18. absent: No sender tag is present, but "UTD" naming the institution; reconsider: "All UTD faculty" references the institution as issuer.
    19. absent: No sender tag or named authority appears in the text.
    20. absent: No sender, agency, or branded signature is identified in the text.
    21. absent: No sender, branded signature, or named authority identifies who issued this message.
    22. absent: No sender, branded signature, or named authority is identified in the text.
    23. absent: No sender, branded signature, or named authority appears in the text.
    24. absent: No sender tag or issuing authority is identified in the text.
    25. absent: No sender tag, agency, or institution names itself in the text.
  • Hazardabsent0/25

    Final assessment

    All 25 reads agree the hazard is absent; the message orders evacuation but names no specific threat such as a bomb.

    What the threat actually is. A complete warning names the specific danger, such as a shooter, a fire, a tornado, or a gas leak, rather than a vague emergency, because people decide what to do based on what they are facing.

    See all 25 individual reads
    1. absent: No specific hazard is named; it only orders evacuation generically.
    2. absent: It orders evacuation but names no specific threat or hazard.
    3. absent: It orders evacuation but names no specific hazard such as a bomb threat.
    4. absent: No specific hazard is named in this text; it only orders evacuation without naming a threat.
    5. absent: No specific threat is named; the hazard prompting evacuation is unstated.
    6. absent: No specific hazard is named, the evacuation order does not state the threat type.
    7. absent: It orders evacuation but names no specific hazard; the threat is not stated.
    8. absent: No specific hazard is named; it states an evacuation without naming the threat.
    9. absent: No specific hazard named; the evacuation reason/threat is not stated in this text.
    10. absent: No specific threat is named; only an evacuation directive is given without the hazard.
    11. absent: It orders evacuation but names no specific hazard or threat.
    12. absent: No specific hazard is named in this evacuation text; the bomb threat is not stated in the text itself.
    13. absent: It directs evacuation but names no specific hazard in this text.
    14. absent: No specific threat is named; it only orders evacuation.
    15. absent: No specific hazard is named; the reason for the evacuation is not stated in this text.
    16. absent: No specific hazard is named; it only orders evacuation without stating the threat.
    17. absent: No specific threat is named; the reason for evacuation is not stated.
    18. absent: No specific hazard is named in the evacuation text itself.
    19. absent: No specific hazard is named; only an evacuation directive without the threat type.
    20. absent: No specific threat is named; mass evacuation is ordered without naming the hazard.
    21. absent: It orders evacuation but names no specific hazard like bomb or fire.
    22. absent: No specific threat is named; it orders evacuation without stating the hazard (bomb is only in slug).
    23. absent: No specific threat is named; only the instruction to evacuate, no hazard stated.
    24. absent: It directs evacuation but names no specific hazard or threat.
    25. absent: It orders evacuation but never names the threat or hazard.
  • Locationpresent25/25

    Final assessment

    All 25 reads agree a specific location is given: all buildings and parking garages on campus and UT Dallas parking lots.

    Where the threat is. Saying whether danger is in a specific building, a part of campus, or area-wide lets people judge their own proximity and choose a safe direction. Without a where, a warning is hard to act on precisely.

    See all 25 individual reads
    1. present: It cites "all buildings and parking garages on campus" and "UT Dallas parking lots".
    2. present: It specifies "all buildings and parking garages on campus" and "UT Dallas parking lots".
    3. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    4. present: It specifies "all buildings and parking garages on campus" and "UT Dallas parking lots".
    5. present: It specifies "all buildings and parking garages on campus" and "UT Dallas parking lots".
    6. present: It says "all buildings and parking garages on campus" and "UT Dallas parking lots", specific places.
    7. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    8. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    9. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    10. present: It specifies "all buildings and parking garages on campus" and "UT Dallas parking lots", named places.
    11. present: It says "all buildings and parking garages on campus" and "UT Dallas parking lots".
    12. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    13. present: It refers to "all buildings and parking garages on campus" and "UT Dallas parking lots".
    14. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    15. present: "all buildings and parking garages on campus" and "UT Dallas parking lots" specify locations.
    16. present: It cites "all buildings and parking garages on campus" and "UT Dallas parking lots".
    17. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots".
    18. present: It references "campus", "buildings and parking garages", and "UT Dallas parking lots".
    19. present: It names "campus," "buildings and parking garages," "UT Dallas parking lots."
    20. present: It specifies "all buildings and parking garages on campus" and "UT Dallas parking lots".
    21. present: It cites "all buildings and parking garages on campus" and "UT Dallas parking lots", specific places.
    22. present: It cites "all buildings and parking garages on campus" and "UT Dallas parking lots", specific places.
    23. present: It cites "all buildings and parking garages on campus" and "UT Dallas parking lots".
    24. present: It names "all buildings and parking garages on campus" and "UT Dallas parking lots", specific places.
    25. present: It cites "all buildings and parking garages on campus" and "parking lots".
  • Guidancepresent25/25

    Final assessment

    All 25 reads agree guidance is present; the alert instructs recipients to immediately evacuate all buildings and stay away.

    The protective action to take. A clear, specific instruction, such as shelter in place, evacuate, avoid the area, or run-hide-fight, drives faster and more correct protective behavior than describing the threat alone.

    See all 25 individual reads
    1. present: "immediately evacuate" and "stay away from buildings" instruct protective actions.
    2. present: It instructs to "immediately evacuate all buildings", a protective action.
    3. present: It instructs "immediately evacuate" and "stay away from buildings", protective actions.
    4. present: It instructs recipients to "immediately evacuate all buildings" and stay away.
    5. present: It instructs "immediately evacuate all buildings" and "stay away from buildings".
    6. present: It instructs "immediately evacuate" and "stay away from buildings", protective actions.
    7. present: It instructs people to "immediately evacuate all buildings".
    8. present: "immediately evacuate all buildings" is a protective instruction.
    9. present: It instructs to "immediately evacuate all buildings" and "stay away from buildings".
    10. present: It instructs "immediately evacuate" and "stay away from buildings", protective actions.
    11. present: It instructs "immediately evacuate" and "stay away from buildings", protective actions.
    12. present: It instructs "immediately evacuate all buildings", a protective action.
    13. present: It instructs recipients to "immediately evacuate all buildings".
    14. present: It instructs "immediately evacuate all buildings".
    15. present: "immediately evacuate" and "stay away from buildings" are protective instructions.
    16. present: It instructs "immediately evacuate all buildings" and "stay away from buildings", protective actions.
    17. present: It instructs to "immediately evacuate all buildings" and "stay away from buildings".
    18. present: It instructs recipients to "immediately evacuate all buildings" and "stay away from buildings".
    19. present: "immediately evacuate all buildings," "stay away from buildings" are protective actions.
    20. present: It instructs "immediately evacuate" and "stay away from buildings", protective actions.
    21. present: It instructs "immediately evacuate all buildings" and "stay away from buildings", protective actions.
    22. present: It instructs recipients to "immediately evacuate all buildings" and go to parking lots, protective actions.
    23. present: It instructs "immediately evacuate" and "stay away from buildings", protective actions.
    24. present: It instructs to "immediately evacuate" and go to parking lots, protective actions.
    25. present: "immediately evacuate all buildings" is a protective action instruction.
  • Timepresent25/25

    Final assessment

    All 25 reads agree timing is present; "immediately" and "until further notice" convey urgency and duration.

    When the message applies. A timestamp, the word now or immediately, or a phrase like until further notice tells the reader whether the danger is current and how quickly to act.

    See all 25 individual reads
    1. present: "immediately" and "until further notice" convey urgency and duration timing.
    2. present: "immediately" conveys urgency.
    3. present: "immediately" and "until further notice" convey time cues.
    4. present: The word "immediately" conveys urgency/recency.
    5. present: The word "immediately" and "until further notice" convey time references.
    6. present: It says "immediately" and "until further notice", recency cues.
    7. present: "immediately" and "until further notice" convey recency.
    8. present: "immediately" and "until further notice" convey timing.
    9. present: "immediately" conveys urgency and "until further notice" a duration cue.
    10. present: "immediately" and "until further notice" convey recency cues.
    11. present: The word "immediately" conveys urgency/recency.
    12. present: The word "immediately" conveys urgency and recency.
    13. present: The word "immediately" conveys urgency and recency.
    14. present: "immediately" and "until further notice" convey recency cues.
    15. present: "immediately" and "until further notice" convey recency cues.
    16. present: It says "immediately" and "until further notice", recency cues.
    17. present: "immediately" conveys urgency/recency.
    18. present: The word "immediately" conveys urgency, a time cue.
    19. present: "immediately" and "until further notice" convey timing.
    20. present: "immediately" conveys an urgent, now-oriented timing cue.
    21. present: "immediately" and "until further notice" convey time cues.
    22. present: "immediately" and "until further notice" convey time cues.
    23. present: "immediately" and "until further notice" convey recency.
    24. present: "immediately" conveys urgency and recency.
    25. present: "immediately" and "until further notice" convey timing.
  • Impactabsent9/25

    Final assessment

    Absent by majority (16 of 9): it orders immediate evacuation of all buildings due to a threat but states no explicit harm, reason, or danger severity; the dissent treated the urgent evacuation as implying serious danger.

    What the hazard could do to the people in its path. Beyond naming the threat, a complete warning conveys its potential consequences or severity, such as that a tornado can level buildings or that a leak could be explosive, so recipients grasp how much danger they are in. Research on warning message content finds that a concrete impact statement helps people personalize their risk and act sooner.

    See all 25 individual reads
    1. absent: Orders immediate evacuation of all buildings but states no explicit danger, harm, or reason.
    2. absent: It directs immediate evacuation of all buildings and to stay away but states no specific harm or danger.
    3. present: Telling everyone to immediately evacuate and stay away from buildings due to a threat strongly implies danger to those near them.
    4. present: It orders immediate evacuation of all buildings and parking garages and to stay away, conveying urgency that implies serious danger to people.
    5. absent: It orders immediate evacuation due to a threat and to stay away from buildings but states no explicit danger or harm severity.
    6. present: It directs everyone to immediately evacuate and stay away from buildings, implying serious danger from the threatened buildings.
    7. absent: Orders immediate evacuation of all buildings due to a threat but states no specific harm or severity.
    8. absent: It orders immediate evacuation but states no explicit harm, danger, or reason conveying severity.
    9. present: Orders immediate evacuation and to stay away from buildings, strongly implying danger from the threat.
    10. absent: It orders immediate evacuation and to stay away from buildings but states no harm or specific danger.
    11. absent: This orders immediate evacuation due to threats but states no explosion risk or specific harm.
    12. absent: Directs immediate evacuation and to stay away from buildings but states no danger or consequence.
    13. present: Orders everyone to immediately evacuate all buildings and garages and stay away, conveying a serious danger to safety.
    14. absent: Directs immediate evacuation and to stay away from buildings but states no harm potential or severity.
    15. absent: Directs immediate evacuation and to stay away from buildings but states no explicit harm or danger.
    16. present: It orders everyone to immediately evacuate and stay away from buildings, implying a serious danger to people from the threat.
    17. present: It directs everyone to immediately evacuate all buildings and parking garages and stay away, the urgency implying serious danger.
    18. absent: An evacuation order to stay away from buildings is guidance without a stated specific danger or harm.
    19. absent: Directs immediate evacuation to stay away from buildings but states no explicit danger, harm, or consequence.
    20. present: It directs everyone to immediately evacuate all buildings and stay away, implying a serious danger that makes the buildings unsafe.
    21. present: Orders immediate evacuation and to stay away from buildings, implying danger to those who remain near the buildings.
    22. absent: It orders evacuation of all buildings due to a threat but states no explosion danger or specific harm.
    23. absent: It orders immediate evacuation and to stay away from buildings but states no explicit harm or severity.
    24. absent: This orders evacuation and to stay away from buildings but states no specific danger or potential harm.
    25. absent: Directs evacuation of buildings and garages but states no explicit danger or potential harm.

Systematic AI judgments with visible reasoning, not human-validated codings.

About this analysis
Context

Background

On the afternoon of Tuesday, June 27, 2017, UT Dallas ordered a complete evacuation of its 455-acre Richardson campus at approximately 2:40 p.m. CDT after receiving a phoned-in bomb threat. Comet Alert text messages directed everyone (faculty, staff, students, and visitors) to leave every building and parking garage and to wait in parking lots. The university's Twitter account followed within minutes, stating plainly that 'we received a bomb threat and are working with UTDPD to make sure the campus is safe.' Just 40 minutes later, at approximately 3:20 p.m. CDT, UT Dallas Police issued an all-clear characterizing the threat as a hoax. UTD Police noted that other campuses around the country received similar threats the same day, suggesting it was part of a coordinated hoax wave, a pattern that would become endemic at US universities over the following years. The June 2017 evacuation occurred during the summer session, when campus population was at its lowest, which contributed to the speed of the clearance. No arrest was publicly announced.
Analysis

Key Findings

UT Dallas's 40-minute resolution was relatively quick for a campus of its size, reflecting the value of a low-population summer session and a phoned-in threat with no specified target building
The split-channel strategy (terse evacuation SMS, plain-language Twitter explanation) is an early example of channel segmentation that became standard practice at US universities by the early 2020s
The all-clear SMS explicitly characterized the threat as a 'hoax' rather than using softer language such as 'no credible threat found'
Outcome
All-clear issued at approximately 3:20 p.m. CDT, about 40 minutes after the evacuation order. Police said the bomb threat was a hoax and was part of a series of similar threats made to colleges around the country that day. No arrest was publicly announced. Summer-session classes resumed the following day.
Provenance

Sources

  1. News
    UT Dallas Evacuated After Bomb Threat (CBS Texas)
    cbsnews.com
    archived copy
  2. News
    UT Dallas Orders Campus-Wide Evacuation After Bomb Threat (NBC 5 Dallas-Fort Worth)
    nbcdfw.com
    archived copy
  3. News
    UT Dallas bomb threat was a hoax (WFAA)
    wfaa.com
    archived copy
  4. News
    Students return to UT Dallas after being evacuated for 'hoax' bomb threat (KXAN)
    kxan.com
    archived copy
  5. Social
    UT Dallas official Twitter post about bomb threat (@UT_Dallas)
    twitter.com
    archived copy
Cite this case

Campus Alert Archive. "The University of Texas at Dallas: Phoned-in bomb threat prompts campus-wide evacuation; determined to be a hoax." Incident of June 27, 2017. Added May 2026; last updated June 2026. https://campusalertarchive.com/case/ut-dallas-bomb-threat-hoax-2017-06-27/

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Alert text quoted on this page remains the work of the issuing institution; the archive is a secondary source.

Tags
bomb-threathoaxtexasevacuationrichardsonut-systemsummer-session2017fast-resolutionHoax
Added May 2026Updated June 2026Via ingestion