LIVERMORE, Maine — A man and his young daughter were injured in an ATV accident on River Road on Monday afternoon, according to a press release from the Maine Warden Service.

John Walker, 25, was operating his 2012 Polaris 400 ATV on a small dirt track along the Androscoggin River around 3:15 p.m. Monday with his 2½-year-old daughter on the ATV in front of him. They were traveling around a corner at a slow speed when he stopped to look back because he thought he was dragging something, according to the warden service. When Walker pressed on the thumb throttle to continue driving, the thumb throttle lever reportedly stuck behind an after-market heated handlebar grip. This caused the machine to accelerate and Walker and his daughter were ejected into a nearby tree.

The girl reportedly was taken by LifeFlight to Maine Medical Center in Portland suffering from facial injuries. Walker was taken to Maine Medical Center in Lewiston for leg injuries.

Walker’s daughter was not wearing a helmet.

The crash remains under investigation. Game Warden Gary Allen is the primary investigating officer and is being assisted by Wardens Evan Franklin and Peter Herring. The Androscoggin County Sheriff’s Office assisted in the investigation.