One person was injured in a rollover accident on Highway 15 in Fairmont early Tuesday morning. 23-year-old Courtney Allen of Blaine was driving a 2002 Chevy northbound on 15 when the vehicle left the road and rolled at around 3:45am. Allen was taken to the Fairmont Hospital with non life-threatening injuries. She was the lone occupant of the vehicle. Allen was not wearing a seatbelt, and alcohol was detected in her system. A State Patrol investigation is underway.