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(NewsNation) — A manhunt is underway for a gunman after four people were killed at a bar in Anaconda, Montana.
The FBI has joined the search for Michael Paul Brown, 45, after the shooting at The Owl Bar, according to the Anaconda Deer-Lodge County Law Enforcement Center.
Brown lives next door to the bar but has yet to be caught after a SWAT team searched his home.
He was last seen in the Stump Town area — approximately 120 miles west of Bozeman — and the public has been advised to stay out of the area. They're urged to avoid approaching Brown, who is considered armed and dangerous.
Anyone who sees him is asked to contact 911. According to authorities, Brown
More than a dozen officers have flooded Anaconda, a town with a population under 10,000 in southwestern Montana, after shots were fired at around 10:30 a.m.
The Montana Division of Criminal Investigation is leading the investigation and confirmed four people died at the scene.
Details about the victims and what led up to the shooting weren't immediately available.
The FBI sent agents to the scene to help with the investigation, FBI Deputy Director Dan Bongino said.
“I’m closely monitoring the situation involving an active shooter in Anaconda. Please join Susan and me in praying for the victims, their loved ones, and the brave law enforcement officers responding to this tragedy,” Montana Gov. Greg Gianforte said in a statement.
The ATF Denver Rocky Mountain Region said it is working alongside local law enforcement.
"ATF continues to work alongside our local law enforcement partners on this investigation, where multiple casualties have been confirmed at The Owl Bar. Please send all media inquiries to local law enforcement as they are the lead investigating agency," ATF wrote in an update.
This is a developing story.