One person has been sent to hospital with life-threatening injuries following a multivehicle crash on Highway 400.
Emergency crews say they were called around 3 p.m., to Highway 400 just south of Highway 9, after three vehicles crashed.
One person was taken to hospital with life-threatening injuries.
There is no word on what caused the collision.
Police say they will be doing a full reconstruction of the scene.
The northbound lanes of Highway 400 were closed between Highway 9 and Aurora Road but have since reopened.
