A person was airlifted to a trauma centre after a two-vehicle crash in Caledon, Ont., early Tuesday, police say.
Ontario Provincial Police (OPP) said the collision happened on Highway 9 near Humber Station Road.
Emergency crews were called to the scene around 1:25 a.m.
The driver of one of the vehicles was airlifted to hospital with life-threatening injuries.
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Roads were closed in the area for the investigation, but have since reopened.
Anyone who witnessed the crash or has dashcam footage was asked to contact Caledon OPP at 905-584-2241 or 1-888-310-1122.