Cambridge OPP say one person is in hospital with life threatening injuries after being struck on the eastbound exit ramp of Highway 401 at Hespeler Road on Saturday.
In a video posted to Twitter just after midnight, Sgt. Kerry Schmidt, media relations officer with the OPP's highway safety division, said a "number of pedestrians" were in the area of Highway 401 eastbound late Saturday when two vehicles exiting the highway onto Hespeler Road were involved in a collision.
One of the vehicles collided with three pedestrians on the eastbound exit ramp.
One of the pedestrians was taken to hospital in life-threatening condition and two others were taken to hospital for treatment.
The ramp was closed for several hours while police investigated.
Anyone with information is asked to call 1-888-310-1122 or the Cambridge OPP detachment at (519) 654-0150.