(MAPLE VALLEY TOWNSHIP) -- An 18-year old Brown City man was seriously injured in a single-vehicle crash Monday afternoon in Sanilac County's Maple Valley Township. Sheriff Garry Biniecki says the roll over crash took place around 3:20 p.m. on Baily Road north of Burnsline Road. An investigation showed that the driver of the vehicle, 18-year old Michael Kinney of Brown City, was traveling north on Baily Road when he lost control and entered a ditch. The vehicle overturned, ejecting Kinney. He was treated by Marlette EMS personnel and air lifted from the scene to Covenant Cooper Hospital in Saginaw for treatment of serious injuries. Two other passengers in the vehicle were taken to Marlette Regional Hospital for treatment of non-life threatening injuries. Their names are not being released. Deputies say that the driver and passengers were not wearing seat belts at the time of the crash. The incident remains under investigation and alcohol is not believed to be a factor. Deputies were assisted by the Brown City Fire Department.