One man died Sunday afternoon in a three-vehicle crash east of Edgemont.

Names of the six people involved are not yet being released pending notification of family members.

Preliminary crash information indicates that a southbound 2011 Toyota Tundra was eastbound on U.S. Highway 18 when it slowed down to make a left-hand turn onto Red Canyon Road. The Toyota was rear-ended by a southbound 2008 GMC Sierra pickup. The collision sent the Toyota into the westbound lane where it was struck by a 2004 Chevrolet Silverado Pickup. The Toyota tipped over and the 57-year-old male driver of the Toyota was pronounced dead at the scene. His seatbelt use is under investigation.

The 53-year-old male driver of the Chevrolet pickup and a 57-year-old female passenger both suffered serious non-life threatening injuries. Both were air transported to a Rapid City hospital. The other female passenger, 43 years old, sustained serious non-life threatening injuries and was taken to a local hospital. The 58-year-old male passenger was not injured. All four were wearing seatbelts.

The 19-year-old female driver of the GMC pickup sustained minor injuries and was not transported. She was wearing a seatbelt.

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