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.

Authorities were scouring a mountainous area of western Montana on Saturday for a military veteran who they say opened fire at a bar, killing four people. See footage from the scene in the video player above.

Michael Paul Brown, the man suspected of fatally shooting four people at The Owl Bar in Montana, remains at large and is “believed to be armed and extremely dangerous,” authorities said.