A manhunt is intensifying for the former U.S. Army soldier who's been at large for days after allegedly gunning down four people at a Montana bar. Michael Paul Brown, 45, is suspected of opening fire on Friday morning at The Owl Bar in Anaconda, a city of about 9,000 people in southwestern Montana, authorities said.

As the search for Michael Paul Brown stretched into its fifth day, Montana Gov. Greg Gianforte signed an executive order freeing up more resources for local law enforcement.

Four people were killed in a shooting at a bar in Anaconda, Montana, on Friday, authorities said. A suspect is at large.