Montana's Highway Patrol is boosting the number of troopers assigned to the eastern part of the state to handle growing law enforcement demands created by the region's oil boom.
Ten new troopers were sworn in Friday after graduating from the patrol academy.
Six are being assigned to counties in Eastern Montana, where companies seeking oil in the Bakken formation along the North Dakota border have drawn a large influx of workers.
Attorney General Steve Bullock says the challenges brought by the boom were illustrated in two recent criminal cases -- the kidnapping of Sidney teacher Sherry Arnold and the negligent homicide case of oil field worker Brian Doyle.
Department of Justice spokeswoman Judy Beck says the new troopers will increase the Eastern Montana force to 26.