Investigators searching for a man they say shot and killed four people at a Montana bar Friday morning have located the vehicle he fled in, but the suspect remains on the loose, officials said.

Michael Paul Brown, 45, fled The Owl Bar in the small town of Anaconda in a white pickup truck but ditched it at some point, said Lee Johnson, administrator of the Montana Division of Criminal Investigation, which is overseeing the case. He urged residents late Friday to stay at home and on high alert.

Four people were killed in a shooting at a Montana bar and law enforcement are searching for a suspect described by his niece as a former U.S. soldier who struggled to get help for mental