Two hikers were injured in a bear attack on Monday on a trail in Yellowstone national park , park officials said. The National Park Service said in a statement on Tuesday that the hikers sustained injuries on Monday by “one or more bears” on the Mystic Falls trail near Old Faithful in Yellowstone national park. Officials did not specify which species of bear. “National Park Service emergency services personnel responded to the incident, and it remains under investigation,” officials said. “No further information is available at this time.” Yellowstone is home to grizzly bears and black bears , per the National Park Service. Craig Lerman, a tourist from Maryland, told Cowboy State Daily that he encountered one of the two injured hikers on the trail after hearing him call for help. “I was hiking up Mystic Falls Trail when I saw bear prints in the mud,” Lerman said. “I kept walking a little further and saw a bloody hat with a watch torn off. He heard me coming and started saying, ‘Help.…