ANCHORAGE, Alaska (AP) — Twenty-five fuel pods jettisoned by military jets have been removed from two northwest Alaska national parks.

The National Park Service in a release the pods were removed this summer from remote areas of Noatak National Preserve and Kobuk Valley National Park.

The pods, which weigh about 6 tons total, were taken to either villages or ranger stations until they could be sent to Anchorage for recycling.

The pods are believed to have been jettisoned from F4 Phantom fighter jets training over the western Brooks Range area in the 1970s.

In addition, other debris was removed this summer from the backcountry, including 12 55-gallon drums and six old snowmachines.

It's the fifth year for the removal project. Other fuel pods and debris have been identified for future removal.