A driver reportedly fled the scene following a high-speed collision on Highway 400 early Saturday morning.
It happened at around 1:30 a.m. near King Road.
Witnesses tell CP24 that a car was travelling at a high rate of speed when it hit the back of a blue SUV, causing it to rollover.
The car then left the scene without stopping.
The condition of the driver of the SUV is not known.
Police continue to investigate.