Ontario Provincial Police say Highway 401 eastbound is fully closed in Whitby following a multi-vehicle collision.
It’s unclear what time the crash occured, but police say the closure is in effect between Thickson Road and Stevenson Road, where emergency crews are responding to the crash.
One person has been taken to hospital with life-threatening injuries, OPP said.
Drivers are being urged to avoid the area and use alternate routes as the investigation and cleanup continue.
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