Law enforcement officers are scouring a mountainous area of western Montana for a military veteran who authorities say opened fire at a bar, killing four people.

The city of Anaconda, Montana, is under lockdown after the Granite County Sheriff's Office reported an active shooter Friday. Authorities said the suspect fled the Anaconda's Owl Bar and is being pursued. In a Facebook post, the sheriff's office said the suspect is wearing a tie‑dyed shirt, blue jeans and an orange bandana.