A man was airlifted to a Sudbury hospital with serious, life-threatening injuries Sunday morning, after being found in a ditch on Manitoulin Island outside his wrecked pickup truck.

Ontario Provincial Police said the man had been driving a Chevrolet Silverado pickup truck, which was left "completely demolished" after an apparent rollover just north of Townline Road in Sheguiandah.

Police said their preliminary investigation has led them to believe the collision happened hours before motorists spotted his damaged vehicle in the ditch.

The subsequent investigation into the crash has closed Highway 6 in both directions, but police said traffic is being routed through a detour on Old Highway 68.