A 31-year-old male died early Saturday in a one-vehicle crash east of Bison.

The name of the person involved is not yet being released pending notification of family members.

Preliminary crash information indicates that a 2001 Chevrolet C3500 service truck was westbound on South Dakota Highway 20 when the driver failed to negotiate a left curve. The driver overcorrected and the vehicle overturned.

The driver, who was not wearing a seatbelt, was thrown from the vehicle. He was pronounced dead at the scene.

South Dakota’s Highway Patrol is investigating the crash. All information released so far is only preliminary.