One person died and another person was injured Saturday morning in a fatal crash involving three motorcycles that occurred near Keystone.

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

Preliminary crash information indicates that a 2019 Indian Roadmaster was westbound on U.S. Highway 16A when the driver failed to negotiate a curve. The motorcycle crossed the center line and collided with an eastbound 2020 Harley Davidson The Indian Roadmaster then went into the ditch and struck a 2011 Harley Davidson Road King, which was unoccupied and parked on the shoulder of the road.

The 63-year-old male driver of the Indian Roadmaster was thrown from his motorcycle and was pronounced dead at the scene. The 60-year-old male driver of the 2020 Harley Davidson suffered serious non-life threatening injuries and was taken by ambulance to a Rapid City hospital. Neither driver was wearing a helmet. The third driver was not injured.

One person died Sunday morning in a two-vehicle crash that occurred east of Hoven.

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

Preliminary crash information indicates that both vehicles were eastbound on South Dakota Highway 20. A 2020 Ford Explorer struck the rear of a 2017 Honda Pioneer ATV. The ATV went into the south ditch and rolled over.

The 62-year-old male driver of the ATV was thrown from the vehicle and was pronounced dead at the scene. The 26-year-old female driver of the Ford was wearing a seat belt and was not injured.

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