Police are investigating the sudden death of a 13-year-old girl in Pennar, Pembroke Dock.
The girl was confirmed dead at her home by paramedics after emergency services responded to a call at 6:45pm on Wednesday 3 April.
Police say the death is not being treated as suspicious.
The girl's family are being supported by specially trained officers.
Chief Inspector Andy Pitt said the incident was "an awful tragedy".
This is an awful tragedy and I pass on my sincere sympathy to the family on behalf of Dyfed-Powys Police.