A shooting at a Montana bar left four people dead Friday, prompting a lockdown in a neighborhood several miles away as authorities searched for the suspect in a wooded area.

Parts of a national forest near Anaconda, Montana, were closed late Saturday as authorities expanded their search for the gunman accused of killing four people at a bar on Friday morning.

Police have found the getaway car of a US military veteran who walked into a bar in the western state of Montana on Friday morning and fatally shot four people, but the gunman remains at large.