York Regional Police say a male cyclist has critical injuries after he was hit by a vehicle in Markham.
Emergency crews were called to Bayview Avenue and John Street at around 3:46 p.m. Sunday.
Police said the cyclist was taken to a trauma centre in critical condition with a severe head injury.
Investigators said the driver remained at the scene.
Officers closed down John Street between Bayview Avenue and Baywood Gate for the investigation.