A suspect is on the run after multiple people were shot in the US state of Montana, authorities say. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) said it was "responding to a shooting where multiple parties have been shot at a business in Anaconda, MT".

Authorities launched a manhunt on Friday after a shooter killed at least four people at a Montana bar hours earlier. The suspect was identified as 45-year-old Michael Paul Brown, who remains at large.