One person died Friday afternoon in a two-vehicle crash east of Stickney.

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

Preliminary crash information indicates that a 2018 Polaris Sportsman 450 H.O. four wheeler was eastbound when it turned south onto 389th Avenue. The vehicle slid around the corner and into the path of a 2004 Peterbilt 379 semi-truck and trailer that was northbound on 389th Avenue.

The 15-year-old male driver of the four wheeler was thrown from the vehicle and was pronounced dead at the scene. He was not wearing a seatbelt. The 22-year-old male driver of the semi-truck was not injured. He was wearing a seatbelt.

One person died Saturday afternoon in a motorcycle crash south of Spearfish.

The name of the person involved has not yet been released pending notification of family members.

Preliminary crash information indicates that a 2001 Harley-Davidson FLHRCI motorcycle was westbound on U.S. Highway 14A when it entered the curve and left the roadway to the left.

The 43-year-old male driver was thrown from the motorcycle and later died at a Spearfish hospital. He was not wearing a helmet.

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