Sarnia Police continue to investigate an early morning collision that left one man in critical condition.

The crash occurred just after 6:30 a.m. Thursday on Churchill Line west of Mandaumin Road and involved a motorcycle and a pickup truck.

Police say the 56-year-old male operator of the motorcycle has been transported by air ambulance to a London hospital in critical condition.

Churchill Line will be closed to traffic between Mandaumin Road and Waterworks Sideroad for several hours. Traffic Branch and Forensic Identification Branch are also on scene.