Dead hiker found in Yellowstone

By the Associated Press | August 27, 2011 | 5:10 PM EDT

YELLOWSTONE NATIONAL PARK, Wyo. (AP) — Yellowstone National Park rangers are investigating whether a man found dead along a trail was killed by a grizzly bear.

The man was found Friday morning by other hikers on the Mary Mountain Trail. Authorities announced the death Saturday but did not name the man.

Officials said the hiker was in his 60s and a native of Michigan, but withheld further identification pending family notification.

A release from the park said there were "signs of grizzly bear activity at the scene" but that there was no immediate determination of how the man died. Authorities say he likely died Wednesday or Thursday.

The Mary Mountain Trail, the Cygnet Lakes Trail and the section of the Hayden Valley west of the Grand Loop Road were closed to hikers pending an investigation.