(ELKLAND TOWNSHIP) -- A 7-year-old Cass City boy was critically injured Wednesday afternoon after crashing a John Deere Gator into a tree at the Rolling Hills Golf Course on Milligan Road in Tuscola County's Elkland Township. According to State Police at the Caro Post, a 5-year-old boy who was riding on the Gator was ejected in the crash but not injured. The 5-year-old was able to drive the Gator to the clubhouse to get help. The 7-year-old was flown by Lifenet to Hurley Hospital in Flint for treatment of life threatening injuries. Troopers were assisted by MMR Ambulance, Cass City Fire Department and the Gagetown Fire Department.