Durham Regional Police say they were called to investigate a collision involving a pedestrian that had occurred at Mary Street East and Pine Street, at 11:30 p.m. Saturday.
The pedestrian was first taken a local hospital, and was later moved to a Toronto hospital.
Police say that the driver involved in the collision left the scene.
The vehicle involved in the collision is believed to be a white General Motors pickup truck or SUV. Police say the vehicle likely has front-end damage.
Anyone with information is asked to contact investigators at 1-888-579-1520, ext. 5213. Information can also be passed on anonymously through Crime Stoppers at 1-800-222-8477.