(DELAWARE TOWNSHIP) -- An 18-year old Caseville man was killed in a two-vehicle crash Tuesday afternoon along M-25 in Sanilac County's Delaware Township. Sheriff's deputies say an initial investigation showed that a GMC Jimmy driven by the victim, was traveling north on M-25 near Huron Line Road around 4 p.m. when the vehicle crossed the centerline and struck a southbound UPS truck driven by a 49-year old Bad Axe man. The Caseville man was pronounced dead at the scene. The Bad Axe man was transported to Harbor Beach Hospital and later flown by Life Net to Saginaw Covenant Cooper Hospital for treatment of serious, life-threatening injuries. The Sanilac County Sheriff's Office Accident Investigation Team continues to investigate the crash and names of those involved are not being released at this time. Deputies were assisted Tuesday by the Michigan State Police, Delaware Township and Sherman Township Fire Departments, and Huron Central and Sanilac EMS personnel.