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Barrie police are seeking the driver of a white pickup truck who was travelling on Hart Drive who they say may have witnessed a single-vehicle collision involving a motorcycle.
Investigators say the driver was seen on video surveillance at the time of the crash, which was around 1:30 Sunday morning.
The driver of the motorcycle was taken to a local hospital and then by air ambulance to a Toronto trauma centre.
If you can help, police ask that you call 705-725-7025, extension 2584.