Toronto Police Investigate Threats to Multiple TDSB High Schools
On Monday, March 23, 2026, the first day students returned from March Break, eleven Toronto District School Board high schools received threats that prompted immediate police response. Toronto Police conducted thorough investigations at all locations and ultimately deemed the threats to be not credible, providing reassurance to the affected school communities.
Initial Threat at Marc Garneau High School
The first threat was reported early in the morning at Marc Garneau Collegiate Institute in Thorncliffe Park. In response to the threat, the school was evacuated as a precautionary measure while police conducted their investigation. After determining the threat was unfounded, students were allowed to return to the building and resume their normal activities.
Additional Threat at Winston Churchill Collegiate Institute
Another threat was directed at Winston Churchill Collegiate Institute, located at Lawrence Avenue East and Kennedy Road. This school implemented a hold and secure protocol while police investigated. Similar to the first incident, police concluded that this threat was also unfounded, allowing the school to return to normal operations.
Police Investigation Findings
Toronto Police revealed that all eleven threats were believed to have originated from the same individual or individuals. According to police statements, the threats were delivered via voicemail to the targeted schools.
"We have been made aware of 11 threats to high schools within the TDSB on Monday. It is believed that the voicemail came from the same individual(s). Officers attended all the locations, investigated and deemed that there was no credible threat," Toronto Police stated.
Affected Schools and Board Response
The TDSB identified the following schools as having received threats:
- William Lyon Mackenzie Collegiate Institute
- Marc Garneau Collegiate Institute
- Wexford Collegiate School for the Arts
- York Mills Collegiate Institute
- York Humber High School
- Winston Churchill Collegiate Institute
- Leaside High School
- Monarch Park Collegiate Institute
- Maplewood High School
- Yorkdale Adult Learning Centre
- West End Alternative School
The school board sent an email to students and families at the affected schools later in the day, confirming that police had been immediately contacted and that there was no credible threat to any of the schools. The board emphasized that safety protocols were followed appropriately throughout the incident.
Ongoing Investigation
While no arrests had been made as of Monday night, the investigation remains active. Toronto Police have requested that anyone with information about these incidents come forward to assist with the ongoing investigation. The TDSB has reiterated its commitment to student safety and cooperation with law enforcement authorities.
The incidents occurred during what should have been a routine return from March Break, highlighting the importance of robust security protocols and rapid response systems in educational institutions. Despite the disruption caused by the threats, all schools were able to resume normal operations once police determined there was no actual danger to students or staff.
