One person had to be airlifted to hospital after a two-vehicle crash south of Ingersoll.
Emergency crews were called to Salford Road between Pigram Road and Culloden Line, where an SUV and a car had collided around 4:30 p.m. on Monday.
One driver suffered injuries described as "life-altering" and had to be airlifted to hospital by Ornge air ambulance. The other driver had minor injuries.
Salford Road was closed for roughly nine hours while police investigated the cause of the collision. It was reopened around 2 a.m. on Tuesday.