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

Amid an ongoing manhunt Montana authorities warned the public Sunday that Michael Paul Brown, the suspect accused of killing four people in a Montana bar on Friday morning, could return to Anaconda, the town where the shooting occurred at the Owl Bar.

Four people were killed in the attack inside the Owl Bar in Anaconda, Mont. The authorities are still searching for the suspect, an Army veteran who lived nearby.