CUSTER, S.D. — Authorities have identified an Iowa man who died in a crash involving two motorcycles in South Dakota’s Custer State Park.

The Highway Patrol says the motorcycles were traveling together on state Highway 87, failed to negotiate a curve and went in the ditch Wednesday afternoon.

Seventy-two-year-old Douglas Boemecke, of Davenport, Iowa, died at the scene. The 52-year-old Illinois man driving the other bike suffered injuries that authorities say are serious but not life-threatening.

Neither bike had any passengers.