The manhunt for an Army veteran suspected of killing four people at a bar he frequented has expanded in the rugged Montana terrain, even as some fear the fugitive may return to the area, authorities said.

Montana Govenor Greg Gianforte was slated to hold an updated press conference sometime Tuesday, Aug. 5 to address the manhunt.

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