Maine wardens are investigating separate accidents that left two snowmobile riders critically injured.
According to the Maine Warden Service, 62-year-old Leo Mitsin was critically injured when he was thrown into a tree after his sled hit a stump Saturday afternoon near his home in the Piscataquis County town of Orneville.
Wardens say Mitsin was not wearing a helmet.
On Friday night, 40-year-old Glen Zona of Worcester, Mass., was thrown from his sled when one of his machine’s skis went off a trail while riding with friends in Dennistown Plantation in Somerset County.
Zona was impaled by a root when he landed and had to be airlifted to a hospital.