Rangers blocked tourists from visiting one of Yellowstone National Park's most popular destinations Thursday as authorities hunted for a female grizzly bear in the area that mauled a backcountry hiker to death.
It was the first fatal grizzly attack inside the park in 25 years - but the third in the Yellowstone region in just over a year.
The attack occurred in an area that is one of Yellowstone's top attractions, and busloads of tourists normally gather there to take in the view from Artist Point, one of the park's most iconic. A stunning waterfall drops hundreds of feet in the canyon, and trails along both canyon rims are normally crawling with tourists.
The identity of the 57-year-old victim was being withheld until his family could be notified. His wife escaped serious injury, park officials said.
Park spokesman Al Nash said the couple saw the bear twice on their hike. The first time, they continued hiking. The second time, the grizzly charged them and the man told his wife to run. She called 911 on her cell phone, and other hikers in the area responded to her cries for help.