AUGUSTA (AP) – 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.

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