A 5-year-old Price boy was killed Friday when an all-terrain vehicle he was riding on flipped over and struck him.

John Seth Hussey was riding on the back of an ATV driven by a 9-year-old relative when the bike overturned while going up a steep hill, said Carbon County Sheriff's Deputy Michael Martinez. The victim was struck in the head.Another 9-year-old boy was riding also, but he and the driver were uninjured.

The boys were cruising the hills near their home when the accident occurred about 6:30 p.m. Thursday. None of the boys wore a helmet, Martinez said.