A 78-year-old woman is in hospital with life-threatening injuries after she was struck by a vehicle in Thornhill this morning.

Police say the woman was struck near Yonge Street and Clark Avenue West shortly before 9 a.m.

The vehicle involved in the collision remained at the scene.

Road closures in the area have been implemented to accommodate a police investigation.

Anyone with further information regarding the crash is asked to call police at 1-866-876-5423, ext. 7704 or Crime Stoppers anonymously at 1-800-222-TIPS (8477).