Three people died and another person was seriously injured in a one-vehicle fatal crash Thursday morning east of Oelrichs.

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

Preliminary crash information indicates that a 2019 Chevy Spark was eastbound on U.S. Highway 18 when the driver lost control. The vehicle rolled several times and came to rest in the west ditch.

Three of the four occupants were pronounced dead at the scene. The other occupant sustained serious non-life threatening injuries and was airlifted to a Rapid City hospital.

None of the occupants were wearing seatbelts.

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