A popular trail at Yellowstone National Park is closed until further notice after a bear attacked a hiker on Tuesday afternoon. The hiker, 29, was walking on the Turbid Lake Trail on the eastern side of the park when he encountered the bear, according to the National Park Service (NPS). (NPS / FOX Weather)Park medics responded to the incident and assisted the hiker, whose injuries were non-life-threatening, the NPS noted. (NPS / Jacob W. Frank / FOX Weather)In the meantime, bear management staff are sweeping Turbid Lake Trail to make sure no other hikers are on the trail, the NPS said. (NPS / FOX Weather)Officials urge park visitors to be bear aware to help avoid surprise bear encounters.