LAWRENCE COUNTY, S.D. (KELO) — The South Dakota Highway Patrol is investigating a fatal two-vehicle crash near Spearfish.

According to the Department of Public Safety, a Nissan Altima was stopped in the westbound driving lane on Interstate 90. A Dodge Ram struck the rear of the Nissan.

Both vehicles came to a stop in the median of the interstate.

The 20-year-old driver of the Dodge Ram was not injured.

The 39-year-old driver of the Nissan Altima sustained fatal injuries during the crash. Officials say he was not wearing a seatbelt.