A Cedar Falls, Iowa, couple and their 6-year-old daughter were fatally shot while camping at an Iowa state park in an apparently random attack by a man from Nebraska, who later turned the gun on himself, authorities said.

The couple leave behind a 9-year-old son, according to the Cedar Falls mayor. It was not immediately clear Saturday if the boy was with his family at the time of the attack at the Maquoketa Caves State Park Campground.

The Iowa Department of Public Safety identified the victims as Tyler Schmidt, 42; his 42-year-old wife, Sarah Schmidt; and their 6-year-old daughter, Lula Schmidt. Their bodies were found in their tent early Friday at the campground, about 180 miles east of Des Moines.

Authorities said the alleged gunman, 23-year-old Anthony Sherwin, was found dead in a wooded area of the park with a self-inflicted gunshot wound.