State police are investigating the death of a 6-month-old baby in Old Lyme.
State police and medical personnel responded to a home on Portland Avenue around 9:45 a.m. on Sunday for a report of an unresponsive child, according to police.
First respondeders attempted rescue measures, but the child was pronounced dead at Middlesex Shoreline Clinic.
Detectives from the Central District Major Crime Squad have taken over the investigation and the baby's cause and manner of death will be determined by the Office of the Chief State Medical Examiner.
No other details were released.