The bodies of Conor (9), Darragh (7) and Carla (3) were found in "unexplained circumstances" last night.
Gardaí have named the three children whose bodies were found in a house in Newcastle, Dublin on Friday night.
They are brothers and sister Conor, aged nine, Darragh, aged seven, and Carla, aged three.
Their bodies have been removed to the city morgue, where a post-mortem examination will take place on Saturday.
A spokesperson for An Garda Síochána said the bodies were found in "unexplained circumstances" at Parson's Court in Newcastle village.
Gardaí were called to the house after 7pm on Friday, 24 January and first found a woman (40s) on the street in a disorientated state.
They then went into the house and found the bodies of the young children.
A statement from the Gardaí added:
"A female relative aged in her 40s was found at the scene and is currently receiving medical attention in Tallaght Hospital."
The scene is currently being examined by members of the Garda Technical Bureau.
Assistant State Pathologist Margot Bolster has also attended the scene.
A family liaison officer has been appointed and is in contact with the father and the extended family.
