Ontario Provincial Police (OPP) say at least one person has died following a collision in Caledon.
It happened in the area of The Gore Road and Healy Road, OPP said Sunday morning.
An image shared from the scene by police showed a pick-up truck and a sedan, both with extensive damage, on the side of the road.
Roads in the area were closed but have since reopened.
No other details have been released so far.