The suspect, named as Michael Paul Brown, is believed to be "armed and dangerous", police say.
Manhunt under way after 4 killed in Montana bar shooting
Anaconda is a former copper smelting hub, with a population of almost 10,000 people in southwestern Montana, 109 miles (175km) west of Bozeman.
The US Bureau of Alcohol, Tobacco, Firearms and E... [1722 chars]