Riverdale Collegiate Institute Lockdown in Toronto: Police Respond to School Threat, Safety Measures Lifted as Investigation Leads to Teen Arrest
TORONTO, ONTARIO — Riverdale Collegiate Institute was among nine Toronto schools placed under emergency safety restrictions on September 16, 2026, after police received reports of a threat involving a student in the Riverdale neighbourhood.
The incident prompted a response from the Toronto Police Service, with school officials implementing precautionary measures while investigators assessed the situation and worked to determine whether the reported threat was credible.
What Happened at Riverdale Collegiate Institute?
According to reports, Toronto police received a call at approximately 9:25 a.m. concerning a threat made toward a student at a school in the area.
Riverdale Collegiate Institute, located at 1094 Gerrard Street East, was among several schools placed under hold-and-secure or shelter-in-place restrictions.
The emergency measures were intended to protect students and staff while officers investigated the potential safety concern.
Authorities lifted the restrictions at approximately 1:30 p.m. that afternoon.
Toronto Police Investigation Leads to Arrest
On September 17, Toronto police announced that a 15-year-old boy had been arrested in connection with the investigation.
Authorities reported several weapons-related charges, including possession of a weapon for a dangerous purpose, carrying a concealed weapon, and assault with a weapon.
The Toronto District School Board subsequently identified Eastdale Collegiate Institute as the school attended by the student who had received the threat.
Riverdale Collegiate Institute was one of the nearby schools affected by the precautionary safety measures.
Previous Riverdale Collegiate Institute Lockdown
The school also experienced a separate lockdown on January 23, 2026, following a threatening telephone call.
Toronto police responded at approximately 10:50 a.m. and investigated the reported threat.
The lockdown was lifted shortly after 1 p.m. when authorities determined that no viable threat had been detected. No injuries were reported.
School Safety and Community Concerns
School lockdowns and hold-and-secure procedures are designed to safeguard students and employees during potentially dangerous situations.
A hold-and-secure order generally restricts access to a school building because of a potential concern nearby, while a lockdown typically involves stricter protective measures within the school.
The incidents highlight the importance of timely communication between school administrators, emergency responders, parents, and students.
Latest Riverdale Collegiate Institute Lockdown Update
As of October 23, 2026, the September 16 safety restrictions had been lifted, and police had announced an arrest related to that investigation.
No additional lockdown at Riverdale Collegiate Institute on October 23 has been independently confirmed.
Parents and residents seeking further information should follow official announcements from Toronto Police and the Toronto District School Board for verified developments concerning school safety.