A four-month-old child suffered severe head injuries and died after the infant fell out of a horse-drawn carriage in Stacyville on Wednesday, Maine State Police said.

Investigators are examining the circumstances of the death, as is standard with any child younger than 3 whose death is not attended by a physician.

The child was in the carriage as it was being driven into a public street, state police said.

It was unclear how many other people were in the carriage, what relationship those people may have to the child, or where the child is from. The fall occurred on Route 11, also known as Station Road, in Stacyville. Police said there were several witnesses to the incident.

The child was transported to Millinocket General Hospital, but did not survive. The child’s name was not immediately released.

Stacyville is in Penobscot County east of Baxter State Park.