SHIN POND — Authorities are investigating an ATV accident in northern Maine that resulted in severe injuries to a 4-year-old boy.

The Warden Service says the Searsport boy was operating the all-terrain vehicle near his grandfather’s home in Shin Pond at about 6 p.m. on Monday. It appears he was driving up an incline when he rolled backwards and the ATV landed on him.

The boy’s father found him unconscious about 200 feet from the home. He was seen wearing a helmet earlier but the helmet was off when he was found.

The boy was taken by ambulance to Houlton Regional Hospital before he was flown to Eastern Maine Medical Center in Bangor with what were possibly internal injuries.

No names were immediately released.

The accident remains under investigation.

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