A manhunt is intensifying for the gunman who allegedly killed a bartender and three patrons at a bar in southwestern Montana, authorities said. Michael Paul Brown allegedly opened fire around 10:30 a.m. local time Friday at The Owl Bar in Anaconda, a city of about 9,000 people in southwestern Montana, according to the Montana Department of Justice.

A manhunt in western Montana extended into Saturday as authorities searched for a suspect they believe fatally shot four people a day earlier at a local bar and who they said remained armed and dangerous.