A Yellowstone National Park trail remained closed Wednesday after a possible grizzly bear attacked a hiker, leaving him with serious injuries.

The 29-year-old man suffered injuries to his chest and arm in Tuesday's attack on the Turbid Lake Trail northeast of Yellowstone Lake. The injuries were not life-threatening, according to authorities.

The solo hiker encountered the bear 2.5 miles into the backcountry and sprayed bear repellent as it began to attack, park officials said in a statement .

National Park Service medics walked out with the hiker. He was then taken to a park clinic and flown to a nearby hospital.

Park officials said Wednesday they had no more information including the man's name, where he was from, and updated condition.

Turbid Lake in Yellowstone National Park NP

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