Three people were found shot to death on Friday at the Maquoketa Caves State Park campground in Iowa where authorities later found the body of the shooter, the Iowa Department of Public Safety said.

Police were called at 6:20 a.m. to the park where they found people deceased at a camp and a camper missing. After searching, officers found the body of the shooter, who suffered from an apparent self-inflicted gunshot wound, west of the park, the department said in a statement.

The department identified the shooter as Anthony Orlando Sherwin, 23. It did not identify the victims.

No further information was immediately available.

The Maquoketa Caves State Park, located 200 miles (322 km) east of Des Moines, Iowa, was closed until further notice, the safety department said.

The park features massive bluffs, trails that wind through geologic formations and caves that can be explored by walkers or spelunkers.