National Park Service officials are investigating the death of a hiker found in the area of the Elephant Back Loop Trail in the Lake Village area of Yellowstone National Park, according to a news release.

About noon Friday, a park ranger found the body of a Montana man who had been reported missing by co-workers that morning.

The identity of the man is being withheld pending notification of family members.

The Elephant Back Loop Trail and immediate area has been closed to hikers while the investigation continues.
There have been signs of grizzly bear activity in the area.
However, a conclusive cause of the death, which likely occurred Thursday afternoon or Friday morning, has yet to be determined.
Hikers are advised to stay on designated trails, leave an itinerary with others, hike in groups of three or more people, be alert for bears, make noise, and carry bear spray.