The shooting happened around 10:30 a.m. local time on Friday at The Owl Bar, according to the Montana Division of Criminal Investigation.

Police say the suspect was "a regular" at the bar where he opened fire, and that a bartender and three patrons were among the victims.

Those killed on Friday were a bartender and three patrons, ranging in age from 59 to 74, the authorities said. The suspect fled into the nearby foothills.