A grizzly bear has killed a moose hunter at a national park in Alaska – the first known fatal mauling by the animals at the site since it was established in 1980, according to reports.

The hunter was on a 10-day moose-hunting trip with a friend when he was attacked by the beast Sunday in the 13.2-million-acre Wrangell-St. Elias National Park and Preserve next to the Yukon in Canada, NBC News reported.

The hunter’s identity was being withheld pending an investigation, according to the National Park Service.

No one else was injured during the attack near the Chisana River drainage, officials said.

The incident was the first known fatal bear mauling recorded at Wrangell-St. Elias, the largest of all US national parks, the world’s largest international protected wilderness area, ABC News reported.

The park, which has nine of the 16 highest peaks in the US, is the same size as Yellowstone National Park, Yosemite National Park and Switzerland combined, according to the National Park Service.

“Visitors are encouraged to be Bear Aware when traveling in the backcountry and take precautions such as carrying bear spray and using Bear Resistant Food Containers,” the park service said in a statement.