Irish police have described the deaths as "unexplained".
Irish police (Gardaí) are set to launch a triple murder investigation after the bodies of the young children were found in a property at Parson's Court, Newcastle.
Three children found dead in a house in Co Dublin have been named as brothers and sister Conor, Darragh and Carla McGinley.
The ages of the children were not immediately clear.
Police are investigating the "unexplained" deaths of three children whose bodies were discovered in a home in Co Dublin.
A family liaison officer has also been appointed and is in contact with the father and the extended family.
Gardaí say they are not looking for any other person in relation to this incident at this time.
The children were found in a house in a small housing development in the village.
The bodies of nine year old Conor, seven year old Darragh and three year old Carla McGinley were discovered in the Parson's Court, Newcastle house yesterday evening at approximately 7.45pm. One woman said the small community is in "absolute shock", and many attended a local mass service on Saturday morning.
"My thoughts are with everybody impacted", the Fine Gael representative said.
His body has since been removed to the mortuary at Tallaght Hospital.
A police spokeswoman added: "Gardaí are now attending the scene of an incident at a domestic house in Newcastle, Co".
Anyone with information is asked to contact Clondalkin Station 01 6667600 or the Garda Confidential Line 1800 666 111.