Six people were taken to hospital following a collision on the Gardiner Expressway in the west end of Toronto overnight.
The crash happened just after midnight on the eastbound lanes near Highway 427.
Sgt. Brett Moore of Traffic Services said a limousine with three occupants rear-ended a car with four people inside.
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Police say one of the injured, a 24-year-old man riding in the car, suffered critical injuries.
Although two vehicles were involved in the collision, police say a third vehicle failed to remain at the scene.
“Whenever there is a fail to remain, it’s a serious incident,” Moore said.
All eastbound lanes were closed between Highway 427 and Kipling for the investigation but reopened just after 8 a.m.