The man accused of killed four people at a Montana bar on Friday morning lived next door to it, according to the Montana Department of Justice.

A manhunt is intensifying for the gunman who allegedly killed a bartender and three patrons at a bar in southwestern Montana, authorities said. Michael Paul Brown allegedly opened fire around 10:30 a.m. local time Friday at The Owl Bar in Anaconda, a city of about 9,000 people in southwestern Montana, according to the Montana Department of Justice.

Authorities were focusing on brushy terrain near the town of Anaconda, where they said the suspect killed four people.