Maine State Police are investigating the death of a 1-year-old boy on Vinalhaven.

The boy’s parents reported him unresponsive Wednesday at approximately 11 p.m., Department of Public Safety spokesperson Shannon Moss said in an emailed statement.

Emergency crews arrived at the family’s home and tried to revive the boy, Moss said. He was then transported to Islands Community Medical Services, where he was pronounced dead.

The Office of Chief Medical Examiner performed an autopsy on the boy Thursday, but the results have not yet been released.

Police said the child’s parents are cooperating with the investigation. No other information was available Thursday.