Authorities are scouring a mountainous area of western Montana for a military veteran who they say opened fire at a bar, killing four people. 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,

Multiple people have been shot at a business in Anaconda in western Montana, the Bureau of Alcohol, Tobacco, Firearms and Explosives said. Montana Gov. Greg Gianforte said on social media that he's "closely monitoring the situation involving an active shooter in Anaconda."

A shooting at a Montana bar left four dead Friday, prompting a lockdown in a neighborhood several miles away as authorities searched for the suspect.