ALFRED, Maine (AP) — Maine State Police say they’ve asked the Naval Criminal Investigative Service for help with their efforts to identify the body of a young boy found on the side of a back road in South Berwick.

During a Tuesday briefing in Alfred, State Police Lt. Brian McDonough said a witness saw a dark blue truck near where the body was found that had some type of Naval insignia near the license plate.

McDonough says investigators have fielded more than 200 tips since the boy’s body was found on Saturday and they’ve worked their way through half of them.

Police gave no indication they were any closer to identifying the child.

The cause of death of the boy, believed to be between 4 and 6 years old, has not been released.