Emergency crews were called to the intersection of Bathurst Street and Steeles Avenue around 7 a.m. Sunday after a female pedestrian was struck by a car.
The vehicle fled the scene before officers arrived, police said.
Paramedics took the victim to hospital, but 32 Division police said they don't know the extent of the victim's injuries.
Investigators are searching for a beige four-door car in the incident.
Anyone with information on the collision is asked to call 32 Division police at 416-808-3200 or Crime Stoppers at 416-222-8477.