One person died early Saturday morning on Rodeo Road in White River.
The South Dakota Department of Public Safety says preliminary crash information indicates an SUV was traveling eastbound on Rodeo Road. For unknown reasons, the passenger left the vehicle while it was still in motion.
The 30-year-old female driver of the SUV was not injured.
The 33-year-old male passenger sustained fatal injuries and was pronounced deceased at the scene.
The South Dakota Highway Patrol is investigating the crash. All information released so far is only preliminary. The names of the persons involved are being withheld pending notification of family members.