Police are looking for Michael Paul Brown, 45, after four people were shot and killed in The Owl Bar in the small town of Anaconda, Montana.

Officers are "unrelenting in their pursuit, working around the clock" to find him, Montana Gov. Greg Gianforte stressed at a news conference on Tuesday. "Rest assured, our brave men and women of law enforcement aren’t giving up."

Authorities in Western Montana are pleading for patience as the manhunt for a suspected gunman in a mass shooting that killed four people in Anaconda stretches into a fifth day. Omar Villafranca reports.