AUGUSTA, Mont. -

Authorities say two military personnel were seriously injured when a Humvee rolled on Montana 21 east of Augusta.
    
One person had a spinal injury and the other had broken bones and a punctured lung after the accident Thursday. Both were taken to a Great Falls hospital.
    
Authorities say two other people suffered minor injuries, including the driver.
    
The Montana Highway Patrol and security personnel from Malmstrom Air Force Base in Great Falls were investigating.