SISSETON, S.D.(Press Release) –  Three people died and another person was injured in a one-vehicle crash late Saturday night southwest of Sisseton.

Names of the four people involved have not yet been released pending notification of family members.

Preliminary crash information indicates that a 2012 Chevrolet Impala was southbound on Roberts County Road 28 when it left the roadway and entered the west ditch. The vehicle struck an approach, went airborne, struck a wooden post, landed on the driver’s side and started on fire.

Three vehicle occupants, a 30-year-old female, and two males, ages unknown, were pronounced dead at the scene. A 29-year-old male occupant sustained serious non-life threatening injuries. He was transported by ambulance to the Sisseton hospital and later transported to a Fargo, N.D., hospital.

Who was the driver has not yet been determined. Seatbelt use is under investigation.

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

The Highway Patrol is an agency of the South Dakota Department of Public Safety.