A female has been transported to hospital with life-threatening injuries following a muitl-vehicle collision.
It happened in the westbound collector lanes of Highway 401 west of Renforth Drive at around 8:30 p.m.
The crash involved two cars and a transport truck, police said. The circumstances surrounding the collision were not immediately clear.
A male also suffered non-life-threatening injuries.
All collector lanes have been closed as police continue to investigate.