Yellowstone National Park officials say a gunman killed by park rangers as he fired a semiautomatic rifle at the entrance of a dining facility with 200 people inside had told a woman he planned to carry out a mass shooting

The warning from a woman in Yellowstone National Park came in just after midnight on July Fourth: She’d just been held at gunpoint by a man who said he planned to carry out a mass shooting — a random attack common in the U.S. these days but not in the Yellowstone region, let alone the park itself.

Rangers spent the next several hours trying to find the gunman before he showed up outside a dining area with 200 people inside. He shot a barrage of bullets with a semi-automatic rifle at a service entrance.

The rangers — including one who was wounded — shot back. Their rounds hit the attacker, Samson Lucas Bariah Fussner, 28, of Milton, Florida, who died at the scene in the busy Canyon Village tourist lodge area near the scenic Grand Canyon of Yellowstone.