A pedestrian is in hospital with life-threatening injuries after being struck by a vehicle in Markham earlier today.

Police said the collision occurred at 16th Avenue and Mintleaf Garden just before 9 a.m. Wednesday.

The 81-year-old male pedestrian was taken to hospital with life-threatening injuries.

The driver of the vehicle, believed to be a 91-year-old woman, and her passenger were not injured in the collision and remained at the scene.

Investigators are trying to determine what led to the collision. Police have not laid any charges at this time.

Traffic was being rerouted around the area while police investigated the incident.

The roads remained closed for several hours but police said they have since reopened.