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 were reportedly killed at the Owl Bar in Anaconda, Montana after a gunman, believed to be armed with an AR-15-style rifle, opened bar inside or near the bar, reports claimed. The incident sparked a citywide emergency response forcing businesses to close.

Authorities are searching for a gunman who allegedly opened fire at a Montana bar on Friday morning and killed four people, officials and media reports say. Law enforcement announced on social media that officers responded to reports of an active shooter in the small town of Anaconda,