Campus Alert Archive
UMass Boston

Single 911 Call Triggers Multi-Agency Response and Campus Lockdown at UMass Boston on September 11

MAswattingemergency 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 September 11, 2025, a single 911 call reporting shots fired near UMass Boston's campus triggered a massive multi-agency police response, campus lockdown, and evacuation. Boston police confirmed there had been no shots fired and no firearms found on campus. The all-clear was issued at 5:11 PM EDT after a nearly 90-minute investigation.

Alerts
4
Response
—
Killed
0
Injured
0
Institution
University of Massachusetts Boston
Public R1 · MA
~16,000 studentsUMass Boston Alert
Confirmed Timeline

Alert Sequence

4 messages in sequence · 4 verified verbatim

INITIAL ALERTTwitter/X
Verified verbatimVerbatim from official @UMassBoston post on X, September 11, 2025116 chars
UMass Boston Alert: Public Safety threat in/near Residence Hall East Building. Avoid area. More information to come.
First in a series of rapidly escalating alerts posted to UMass Boston's X account beginning shortly after 3:40 PM EDT
Boston police received the 911 call at approximately 3:43 PM EDT
The 'public safety threat' framing was deliberately less specific than 'active shooter,' a calibration choice during the unverified initial reports
UPDATETwitter/X+21 min
Verified verbatim70 chars
UMass Boston Alert: Police incident in/near Campus Center. Avoid area.
The alert footprint expanded from Residence Hall East to also flag the Campus Center as the perceived threat moved across campus
A separate alert flagging the Edward M. Kennedy Institute (EMKI) used the same template language
Students in residence halls received text alerts around 4:00 PM telling dorm residents to stay in their rooms and not answer doors for anyone except police
UPDATESMS+1h 15m
Verified verbatim103 chars
UMB Emergency Alert: Classes and activities are canceled for the evening. Police investigation ongoing.
This alert cancelled all evening classes and activities while the investigation continued
Boston College High School, located nearby, was also placed on lockdown and issued its own all-clear around 4:50 PM
The system identifier shifted from 'UMass Boston Alert' to 'UMB Emergency Alert,' a template the university uses for all-campus directives
ALL CLEARSMS+1h 31m
Verified verbatim120 chars
UMB Emergency Alert: Police have reported the incident on campus all clear. There is no ongoing threat to the community.
The all-clear came approximately 90 minutes after the initial alert
Chancellor Marcelo Suarez-Orozco confirmed that police found no evidence of gunfire on campus or in any adjacent buildings
The phrasing 'reported the incident on campus all clear' is unusually formal for a template all-clear, reflecting institutional caution after a mass-evacuation event
Context

Background

On the afternoon of September 11, 2025, Boston police received a single 911 call reporting shots fired near UMass Boston's campus at approximately 3:43 PM EDT. UMass Boston began issuing a series of escalating alerts starting at 3:40 PM, first reporting a police incident near the Edward M. Kennedy Institute, then expanding to the Residence Hall East Building and Campus Center. By 4:00 PM, students in dorms received text messages telling them to stay in their rooms and not answer doors for anyone except police. A massive multi-agency police response descended on the campus at 240 Morrissey Boulevard in Dorchester. Boston College High School, located nearby, also went into lockdown. An officer already patrolling the area had neither heard nor seen anything suspicious, and the university's gunshot detection system had not triggered. By 5:11 PM, police issued the all-clear after finding no evidence of gunfire, no firearms, and no injuries. Chancellor Marcelo Suarez-Orozco confirmed the incident was a false alarm. UMass Boston cancelled all evening classes and activities. The incident occurred as approximately 45 U.S. colleges and universities had been targeted by similar hoaxes during the fall 2025 semester.
Analysis

Key Findings

A single 911 call triggered a massive multi-agency response despite no corroborating evidence, demonstrating the resource cost of swatting
UMass Boston's gunshot detection system provided a rapid counter-indicator, helping police confirm the false alarm
The incident occurred on September 11, a date with heightened security sensitivity, potentially amplifying the emergency response
Outcome
Police found no evidence of gunfire or firearms on campus. No injuries were reported. UMass Boston cancelled all remaining classes and activities for the evening. The incident occurred amid a nationwide wave of swatting hoaxes targeting colleges and universities.
Provenance

Sources

  1. News
    All clear at UMass Boston campus after reports of shots fired (WBUR)
    wbur.org
  2. News
    UMass Boston issues all clear after unconfirmed shooting report (The Dorchester Post)
    dorchesterpost.com
  3. News
    All clear at UMass Boston after unconfirmed report of shooting (NBC Boston)
    nbcboston.com
  4. News
    All clear at UMass Boston campus; no confirmed shots fired (GBH)
    wgbh.org
  5. Source
    Surge in Swatting Incidents: Number of Hoax Threats Continues to Grow (Campus Safety Magazine)
    campussafetymagazine.com
Tags
swattingfalse-alarmmassachusettsbostonmulti-agency-responsecampus-lockdowngunshot-detectionpublic-universityverbatim-from-official-xHoax
Added May 2026Updated May 2026Via ingestion