A 17-year-old has been arrested and charged following an incident involving a pellet gun on Monday at Sir Frederick Banting Secondary School.
An altercation took place between two youths and one of them brandished a firearm that was later determined to be a pellet gun.
The teen was arrested by police around 4:30 pm.
He is charged with possession of an imitation weapon for a dangerous purpose and breach of recognizance.
The teen cannot be identified under the Youth Criminal Justice Act.
The school was placed under a "hold and secure" safety protocol for a couple of hours. The lockdown was lifted at 1:55 p.m.