A pair of climbers had started their climb up the face of a ridge in an Alaska national park when a chunk of glacier ice came crashing down from the peak.
The block of ice slammed into the climbers as it fell from Ruth Glacier in Denali National Park early Thursday, the National Park Service said.
A 31-year-old man from Logan, Utah, was knocked unconscious by the ice. When he regained consciousness, he found his climbing partner had died from the impact.