A man in his 20s is dead after being struck by a vehicle on Highway 10 near Caledon village.
Police say the man was struck at around 3:15 a.m.
He was skateboarding at the time. A second skateboarder was with him but was not hit.
Police have not released the name of the victim.
The driver remained on the scene.
The road will remain closed in the area while OPP investigates the collision.