Students of Lakeshore Collegiate in south Etobicoke were temporarily moved to the nearby Toronto Police College as police investigated a threat against the school.
Const. Craig Brister said police were called to the school at 350 Kipling Avenue at 8:38 a.m. on Friday.
Approximately 600 students were sent to the police college approximately 1.4 kilometres away.
School board officials said police were called to investigate a threat made against the school.
Police described the concern as a “security issue,” but did not elaborate on what the threat was.
Students returned to the school at 1:30 p.m. after the police found no safety concerns inside.