Peel police say a man was struck by a vehicle near Highway 403 and Hurontario Street in Mississauga Friday afternoon.
Peel police said an officer was flagged down at the highway onramp because a man was allegedly causing a disturbance.
The officer then allegedly got into a physical confrontation with a man and then ran from the officer and onto the highway.
He was then struck by a passing vehicle on the highway, police said.
Police said the man has been transported to a local trauma centre with serious injuries.
The province’s Special Investigations Unit has been contacted about the incident.
No other information has been released by the police at this time.