Skip to content
Campus Alert Archive
UD

Bomb threat evacuates three buildings on The Green; no devices found

AI-generated · every claim is source-linked
DEbomb threatemergency notificationmedium confidence
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 the morning of September 30, 2025, the University of Delaware issued a UD Alert at approximately 11:45 AM EDT directing the evacuation of Gore Hall, Mitchell Hall, and Sharp Lab (three buildings on the South College Avenue side of The Green) after receiving a bomb threat. UD Police searched the buildings and gave the all-clear at approximately 2:00 PM EDT. The threat was unfounded. UD was one of several institutions hit that day, a wave that also targeted Delaware State University (Dover), Morgan State and Towson (MD), Monroe County Community College (MI), Prairie View A&M and Lone Star College-University Park (TX), and University of Alaska Fairbanks (AK).

Alerts
2
Response
Killed
0
Injured
0
Institution
University of Delaware
Public R1 · DE
All UD cases →
~24,000 studentsUD Alert
Official alert policy
Read when and how UD says it will use UD Alert: summarized, quoted, and analyzed.
Documented Timeline

Alert Sequence

2 messages in sequence · 1 verified verbatim

Some messages in this sequence are documented (their existence, timing, and channel are sourced) but their exact wording is not preserved in the public record. Those entries appear as placeholders; only confirmed text is displayed.

INITIAL ALERTSMS
Verified verbatimQuoted in NBC10 Philadelphia112 chars
Please evacuate Gore Hall, Sharp Lab, and Mitchell Hall. Avoid the area and follow all instructions from police.
Sent at approximately 11:45 AM EDT on September 30, 2025
Gore Hall is UD's main classroom building, Mitchell Hall is the historic 1930s auditorium, and Sharp Lab houses physics, all three sit along South College Avenue facing The Green
UD Alert is the University of Delaware's emergency notification system administered through Rave Mobile Safety, reaching SMS, email, voice, and digital signage simultaneously
ALL CLEARSMS+2h 15m
Wording not preserved
A all clear message is documented at this point in the sequence, but its exact wording is not preserved in the public record. The public edition displays only confirmed alert text.
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.

Please evacuate Gore Hall, Sharp Lab, and Mitchell Hall. Avoid the area and follow all instructions from police.

  • Sourcepresent18/25

    Final assessment

    Majority finds police named as the responding authority via follow all instructions from police; a minority read police only as whose instructions to follow, not the issuer.

    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. present: It tells recipients to "follow all instructions from police", identifying police as responding authority.
    2. absent: No sender or branded signature appears, only "police" referenced for instructions.
    3. present: It references "police", a named responding authority.
    4. present: It names "police" as the authority whose instructions to follow.
    5. absent: No sender tag or university name appears; "police" is referenced only as whose instructions to follow, not as the issuer.
    6. present: It refers to "police" as the responding authority whose instructions recipients should follow.
    7. present: Refers to following instructions "from police", identifying a responding agency.
    8. present: It references "police" whose instructions to follow, a named authority.
    9. present: References "police", a named responding agency to follow instructions from.
    10. absent: No sender tag or issuing authority is named; "police" is referenced only as whose instructions to follow.
    11. absent: No sender tag or self-naming authority; "police" are referenced only as people to follow.
    12. absent: No sender tag or issuing authority is named; "police" appears only as instructions to follow.
    13. present: It references "police" as the authority directing instructions.
    14. absent: No sender tag or named issuing authority appears, though it cites "police".
    15. present: Identifies "police" as the issuing/responding authority.
    16. absent: No sender name or branded signature appears, only "police" as those to follow, not the sender.
    17. present: Names "police" as the authority whose instructions to follow.
    18. present: It tells recipients to "follow all instructions from police", naming a responding authority.
    19. present: It references "police" whose instructions to follow, a named authority.
    20. present: It instructs recipients to follow instructions "from police", naming the responding authority.
    21. present: Names "police", the responding authority.
    22. present: It names "police" as the authority whose instructions to follow.
    23. present: It references "follow all instructions from police", naming the police authority.
    24. present: Refers to "instructions from police", naming a responding authority.
    25. present: It references following instructions "from police", identifying a responding authority.
  • Hazardabsent0/25

    Final assessment

    Unanimous: the message orders building evacuations but never names the threat.

    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: It orders evacuation of buildings but never names what the threat is.
    2. absent: No specific hazard is named; only evacuation of buildings is ordered without a stated threat.
    3. absent: No specific threat is named, only an instruction to evacuate buildings.
    4. absent: It orders evacuation but names no specific hazard in the text.
    5. absent: It orders evacuation but never names the specific hazard prompting it.
    6. absent: No specific hazard is named; it only orders evacuation without stating the threat.
    7. absent: Orders evacuation but names no specific threat such as a bomb or fire.
    8. absent: It orders evacuation of buildings but names no specific threat in this text.
    9. absent: No specific hazard is named, only buildings to evacuate.
    10. absent: No specific threat is named; only evacuation orders without stating the hazard.
    11. absent: No specific hazard is named in this evacuation order text.
    12. absent: No specific hazard is named; it only orders evacuation of buildings.
    13. absent: No specific threat is named; it only orders evacuation without stating the hazard.
    14. absent: No specific hazard is named; it orders evacuation without stating the threat.
    15. absent: No specific threat is named; it only orders evacuation of buildings without stating why.
    16. absent: No specific hazard is named, only an instruction to evacuate buildings.
    17. absent: No specific hazard is named, only an evacuation instruction without stating the threat.
    18. absent: No specific hazard is named; it only orders evacuation of buildings.
    19. absent: No specific hazard is named, only buildings to evacuate.
    20. absent: No specific hazard is named; the threat prompting evacuation is not stated.
    21. absent: No specific hazard named; only buildings to evacuate, threat type unstated.
    22. absent: No specific hazard is named; only evacuation of buildings without stating bomb, fire, or threat.
    23. absent: No specific hazard is named; only an evacuation is ordered.
    24. absent: No specific threat is named; the order to evacuate gives no hazard.
    25. absent: It orders evacuation of named buildings but names no specific hazard in this text.
  • Locationpresent25/25

    Final assessment

    All reads agree on specific buildings, Gore Hall, Sharp Lab, and Mitchell Hall.

    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 names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    2. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    3. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    4. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    5. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    6. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    7. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    8. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall" and "the area", specific places.
    9. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    10. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    11. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    12. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    13. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    14. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    15. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    16. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    17. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    18. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    19. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific places.
    20. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall" and "the area".
    21. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall" and "the area", specific places.
    22. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall" plus "the area", specific places.
    23. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
    24. present: Names "Gore Hall, Sharp Lab, and Mitchell Hall", specific locations.
    25. present: It names "Gore Hall, Sharp Lab, and Mitchell Hall", specific buildings.
  • Guidancepresent25/25

    Final assessment

    Unanimous: the alert instructs recipients to evacuate, avoid the area, and follow police, protective actions.

    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: It instructs recipients to "evacuate", "Avoid the area", and follow police, protective actions.
    2. present: It instructs "evacuate", "Avoid the area", and "follow all instructions from police".
    3. present: It instructs recipients to "evacuate", "Avoid the area", and follow police instructions.
    4. present: It instructs "evacuate", "Avoid the area", and "follow all instructions", protective actions.
    5. present: It instructs recipients to "evacuate", "Avoid the area", and "follow all instructions from police".
    6. present: It instructs recipients to "evacuate", "Avoid the area", and "follow all instructions", protective actions.
    7. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions", protective actions.
    8. present: It tells recipients to "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    9. present: Instructs "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    10. present: It instructs recipients to "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    11. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    12. present: It tells recipients to "evacuate", "Avoid the area", and "follow all instructions from police".
    13. present: It instructs "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    14. present: Instructs "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    15. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions from police".
    16. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions from police".
    17. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions".
    18. present: It instructs people to "evacuate" and "Avoid the area", protective actions.
    19. present: It instructs recipients to "evacuate", "Avoid the area", and follow police, protective actions.
    20. present: It tells recipients to "evacuate", "Avoid the area", and "follow all instructions from police".
    21. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions".
    22. present: It instructs recipients to "evacuate", "Avoid the area", and "follow all instructions from police".
    23. present: It instructs "evacuate", "Avoid the area", and "follow all instructions from police", protective actions.
    24. present: Instructs recipients to "evacuate", "Avoid the area", and "follow all instructions", protective actions.
    25. present: It tells recipients to "evacuate", "Avoid the area", and "follow all instructions", protective actions.
  • Timeabsent0/25

    Final assessment

    Unanimous: no clock time, date, or recency cue such as now appears.

    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. absent: No clock time, date, or recency cue such as "now" appears.
    2. absent: No clock time, date, or recency cue appears.
    3. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    4. absent: No clock time, date, or recency cue appears in the text.
    5. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    6. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    7. absent: No clock time, date, or recency cue appears in the text.
    8. absent: No clock time, date, or recency word appears.
    9. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    10. absent: No clock time, date, or recency cue appears in the text.
    11. absent: No clock time, date, or recency cue appears in the text.
    12. absent: No clock time, date, or recency cue appears.
    13. absent: No clock time, date, or recency cue appears in the text.
    14. absent: No clock time, date, or recency cue such as now or immediately appears.
    15. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    16. absent: No clock time, date, or recency word appears in the message.
    17. absent: No clock time, date, or recency cue appears in the text.
    18. absent: No clock time, date, or recency cue appears in the text.
    19. absent: No clock time, date, or recency word appears in the text.
    20. absent: No clock time, date, or recency cue appears in the message.
    21. absent: No clock time, date, or recency cue appears.
    22. absent: No clock time, date, or recency cue such as "now" or "immediately" appears.
    23. absent: No clock time, date, or recency cue appears.
    24. absent: No clock time, date, or recency cue appears in the text.
    25. absent: No clock time, date, or recency word appears.
  • Impactabsent0/25

    Final assessment

    Unanimous absent; all 25 reads agree there is no stated hazard consequence, harm, or severity.

    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 evacuation of buildings and to avoid the area but states no explicit harm or danger.
    2. absent: Orders evacuation of buildings and to avoid the area without stating any danger or harm.
    3. absent: Directs building evacuations and to follow police with no stated harm or danger.
    4. absent: It instructs evacuating buildings and to avoid the area but states no harm or how dangerous the threat is.
    5. absent: Directs evacuation of buildings with avoid guidance but states no harm or what it could do.
    6. absent: Directs evacuation of buildings without stating any explicit harm, danger, or potential consequence.
    7. absent: It directs evacuation of buildings and to follow police but states no explicit harm or severity.
    8. absent: An evacuation order for a bomb threat states guidance but no explicit harm or consequence.
    9. absent: Orders evacuation of buildings and to follow police without stating explicit harm or danger.
    10. absent: Orders evacuation of buildings and to avoid the area without stating any harm or danger.
    11. absent: It orders evacuation of buildings and to avoid the area but states no harm or explicit danger.
    12. absent: It directs evacuation of buildings and to avoid the area but states no explicit danger or consequence.
    13. absent: It directs evacuation of buildings and to avoid the area without stating any explicit harm or severity.
    14. absent: It orders evacuation of buildings and avoiding the area but states no explicit danger or harm.
    15. absent: Orders evacuation of buildings and avoidance but states no explicit harm or danger consequence.
    16. absent: Directs evacuation of buildings and to avoid the area with no stated harm or danger.
    17. absent: It directs building evacuations and to follow police instructions but states no explicit harm or consequence.
    18. absent: It directs evacuation of buildings and to avoid the area but states no explicit harm or danger.
    19. absent: It orders evacuation of buildings and to avoid the area but states no explicit danger or consequence.
    20. absent: Orders evacuation of buildings without stating any harm or specific danger.
    21. absent: It orders evacuation of buildings and to avoid the area but states no explicit harm or stated danger.
    22. absent: It directs evacuation of buildings and to avoid the area but states no explicit harm, danger, or severity.
    23. absent: Orders evacuation of buildings without stating any harm or danger.
    24. absent: It orders evacuation of buildings and to avoid the area but states no consequence or harm.
    25. absent: It instructs evacuation of buildings and to avoid the area but states no explicit harm or danger.

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

About this analysis
Context

Background

The University of Delaware is a public R1 doctoral institution serving approximately 24,000 students in Newark, Delaware. UD operates a UD Alert emergency notification system administered through Rave Mobile Safety. On the morning of September 30, 2025, UD received a bomb threat targeting three buildings on the South College Avenue side of The Green: Gore Hall (UD's main classroom building), Mitchell Hall (the 1930s auditorium), and Sharp Lab (physics). UD issued a UD Alert at approximately 11:45 AM EDT ordering the immediate evacuation of all three buildings. UD Police conducted a comprehensive search and issued the all-clear at approximately 2:00 PM EDT, about 2 hours and 15 minutes later. The threat was unfounded. UD's evacuation was part of a coordinated multi-state bomb-threat wave that morning that also affected Delaware State University in Dover (an HBCU), Morgan State University (Baltimore HBCU), Towson University (MD), Monroe County Community College (MI), Prairie View A&M and Lone Star College-University Park (TX), and the University of Alaska Fairbanks. The simultaneity of these threats across multiple states and institution types (R1 publics, HBCUs, community colleges, and Alaska institutions) suggests coordination. The case is significant because it documents a non-HBCU R1 evacuation that was one node in a multi-state same-morning hoax wave.
Analysis

Key Findings

UD was one of at least eight US institutions hit by bomb threats on September 30, 2025, in an apparently coordinated multi-state hoax wave
Total response cycle from initial UD Alert to all-clear was approximately 2 hours, 15 minutes
All three named buildings (Gore Hall, Mitchell Hall, Sharp Lab) sit along South College Avenue facing The Green, UD's historic core
The September 30 wave hit a mix of R1 publics, HBCUs (DSU, Morgan State), community colleges, and Alaska institutions
The September 30 wave came weeks after the August 2025 college swatting cycle
Outcome
UD Police searched Gore Hall, Mitchell Hall, and Sharp Lab and found no devices. The all-clear was issued at approximately 2:00 PM EDT, ending an approximately 2 hour 15 minute evacuation. No injuries occurred and classes resumed in unaffected buildings. UD was one of multiple institutions hit on September 30, 2025 in a coordinated multi-state bomb-threat wave.
Provenance

Sources

  1. News
  2. News
  3. News
  4. News
  5. News
  6. News
  7. Official
  8. News
Cite this case

Campus Alert Archive. "University of Delaware: Bomb threat evacuates three buildings on The Green; no devices found." Incident of September 30, 2025. Added May 2026; last updated July 2026. https://campusalertarchive.com/case/university-of-delaware-bomb-threat-second-2025-09-30/

Download case JSON

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

Tags
bomb-threatdelawareudnewarkgore-hallmitchell-hallsharp-labmulti-state-waveseptember-30-2025coordinated-hoaxpurgatory-tailHoax
Added May 2026Updated July 2026Via ingestion