OTTAWA -- Ontario Provincial Police say one person has been airlifted to hospital with life-threatening injuries after a crash east of Casselman.

OPP say it appears a driver in an eastbound vehicle struck a pillar from an overpass in the area between Highway 138 and County Road 20 at around 7:37 a.m. Sunday and ended up in a ditch on the south side of the highway.

The 55-year-old driver, who was the only person in the vehicle, suffered life-threatening injuries and was taken by Ornge air ambulance to the hospital.

OPP are investigating the crash. 

A stretch of Highway 417 eastbound was closed between Highway 138 and County Road 20. It reopened just after 2 p.m. Sunday.