HARRISON, Ark. (AP) — A federal prosecutor in Arkansas says he won't file charges against two national park rangers in connection with the shooting death of a Missouri man who was camping near the Buffalo National River.

The National Park Service says U.S. Attorney Duane Kees has determined that the rangers, who have not been identified, were justified in the August 2017 fatal shooting of 34-year-old Jonathan Bolger of Branson at the Spring Creek Campground near Yellville.

Authorities say Bolger was holding a compressed air-powered pistol at the time and refused to drop it after confronting the rangers. The park service says the air pistol appeared to the rangers to be a semi-automatic handgun.

A state prosecutor previously investigated the shooting and also cleared the rangers.