FARMINGTON — Two sisters flown from the scene of a crash on Main Street near 1800 North Thursday afternoon are in serious but stable condition, police said.

The driver, 17-year-old Jayci Giles, was taken to the Intermountain Medical Center in Murray with a broken jaw and broken clavicle and lacerations. Her sister Cydni Giles, 15, was taken to University Hospital with a broken nose and lacerations.

Both girls were wearing seat belts when their sport-utility vehicle veered off Main Street about 3 p.m. and hit an embankment, vaulting it into the air, said Farmington police detective Shane Whitaker. The SUV spun in midair before hitting a power pole. It then crashed into a temporary office building in a construction area.

Paramedics had to cut the SUV apart to rescue the girls. Both would likely have died if not for their seat belts, Whitaker said.

Police continue to investigate the crash but believe Jayci Giles may have been experiencing a seizure when the SUV went off the road.

Traffic on Main Street was shut down temporarily.