(TUSCOLA COUNTY) -- A 4-year old boy was injured Monday evening while riding a quad runner on his family's property near Mayville. Tuscola County Sheriff's deputies were sent to the residence on M-24 shortly before 7 p.m. Deputies learned that two brothers were riding separate quad runners. As the 4-year old was riding on one of the machines, it rolled on top of him, pinning him underneath. The family was able to get the quad runner off the boy. Lifenet Helicopter flew the child to Hurley Hospital in Flint for treatment. The extent of his injuries is unknown. The incident remains under investigation.