The Oklahoma Highway Patrol is investigating the circumstances surrounding a single-vehicle Interstate 35 crash that claimed the life of an Ardmore man Tuesday night.

The patrol said Phillip Bryan Hutchens, 60, was pronounced dead at the scene of crash.

The accident occurred shortly before 8 p.m. in the northbound lanes of I-35 near mile marker 10. Hutchens was driving a 2005 Ford pickup, and for an unknown reason, ran off the road. The pickup overturned three times, ejecting Hutchens about 140 feet.

The victim was not wearing a seat belt at the time of the crash, OHP said.

The cause of the crash is still being investigated.