Shortly after 7:30 p.m., police said an 82-year-old woman was driving north toward Thorncliffe Park Drive and stopped at a red light on Overlea Avenue.
Meanwhile, a 12-year-old boy was riding his bicycle heading east on the crosswalk, on the south side of the intersection.
The traffic light turned green and the driver went ahead and hit the boy, police said.
The boy was rushed to SickKids Hospital with life-threatening injuries. Police later said the boy was in stable condition.
In a press release Friday morning, police corrected the boy’s age after initially reporting he was 11 years old.
The driver remained at the scene of the collision, police said.
Anyone with information is required to contact the police at 416-808-1900 or Crime Stoppers anonymously at 416-222-TIPS (8477).