One person was taken to hospital after being struck by a vehicle in the city's north end Tuesday evening.
Sarnia police, Sarnia Fire and Rescue and Lambton EMS were called at about 7:30 p.m. to a collision on Rosedale Avenue.
Police said a 28-year-man was struck by a vehicle between Pineview Avenue and Kenwood Avenue, and is in critical condition in hospital.
The Sarnia Police Service Traffic Unit was on scene until about 2 a.m. Wednesday and the investigation is ongoing.
Anyone with information is asked to contact Cst. Mark Berger at 519-344-8861, extension 6156.