A nine-year-old boy was flown to the hospital after falling off the back of a ATV in Waupaca County.

The incident happened Friday, approximately 11:36 a.m. at N6028 Drath Road in Ogdensburg on private property.

Deputies say a 12-year-old boy was driving the ATV with the nine-year-old as the passenger.

The boy was not wearing a helmet, authorities say.

The extent of the boy’s injuries are unknown.