A nine-year-old girl was seriously injured in an ATV rollover accident in Freeport Saturday morning.

11-year-old Ava Smith was driving the ATV in a driveway when she lost control. Her passenger, Eve Shaw was not wearing a seat belt and flew from the ATV, landing on the ground. Her injuries are said to be life-threatening. Smith, who was wearing a seat belt, sustained minor injuries. Speed is believed to be a factor in the crash.