The manhunt for the person who opened fire and killed four people at a Montana bar stretched into its fourth day Monday.

The search for Michael Paul Brown, who is suspected of killing four people, entered its fifth day on Tuesday with Governor Gianforte taking larger action

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."