Four people were sent to hospital after a collision involving 3 vehicles on Wilson Avenue.

It happened just after midnight on Wilson, at Ridge Road, west of Keele.

Traffic services say a car travelling westbound on Wilson, rear ended another vehicle, which then slammed into a pole.

That first car kept going, and collided with another car travelling eastbound, head-on.

A passenger in that first car was partially ejected and suffered life-threatening head injuries. Three others suffered non-life threatening injuries.

Wilson avenue was closed for several hours between Lexfield Ave and Ridge Rd for the investigation.