John Mark Houser killed when his vehicle is hit by semi truck.

A 52-year-old Maryland man was killed when the vehicle he was in was struck by a tractor-trailer in Mount Holly Springs Thursday morning.

John Mark Houser's vehicle was hit just before 6 a.m. at Routes 34 and 94, according to the Cumberland County Coroner's office.

Houser, of Westminster, Md., was the only person in the vehicle, according to the coroner's office. An autopsy is scheduled for Friday.