Two campers were found dead Sunday at a national park on a remote island in the middle of Michigan’s Lake Superior, authorities said.

Rangers received a report at approximately 4 p.m. about two fatalities at a backcountry campsite in Isle Royale National Park, stated the National Park Service (NPS) on Tuesday.

Two rangers hiked 11 miles to the campground overnight and arrived early Monday morning. NPS said the rangers confirmed the two deaths.

The identities of the two campers, along with their causes of death, were not immediately known, according to NPS.

The secluded park is accessible solely by ferry, seaplane, or personal watercraft, as indicated on the NPS website. It provides various activities for backpackers, hikers, boaters, paddlers, and divers.

Isle Royale National Park offers experiences for backpackers, hikers, boaters, paddlers and divers. (Ellen Creager, Detroit Free Press, File)

Extreme weather keeps the park closed from Nov.1 through April 15.