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.

Multiple people have been shot at a business in Montana, the Bureau of Alcohol, Tobacco, Firearms and Explosives said Friday, Aug. 1, on X .