A manhunt is intensifying for the gunman who allegedly killed a bartender and three patrons at a bar in southwestern Montana, authorities said.

Manhunt continues for Michael Brown after fatal shooting at Anaconda bar left four residents dead. The suspect was last seen barefoot and shirtless.

Knudsen identified the four victims as 59-year-old Daniel Edwin Ballie, 64-year-old Nancy Lauretta Kelly, 70-year-old David Allen Leach and 74-year-old Tony Wayne Palm. Kelly was an employee of the bar, while the other three victims were patrons. All four were living in Anaconda.