Three children who were found dead in a house in Co Dublin on Friday night have been named as Conor (9), Darragh (7) and Carla (3) McGinley.
A woman believed to be the children's mother was taken to hospital following the discovery of the two boys and a girl, who are all believed to be under 10.
Investigating Gardaí are appealing for witnesses and in particular to anyone with camera footage to make it available to them.
It is believed the family moved to Newcastle about a year ago.
Garda forensic officers were continuing to conduct examinations inside the semi-detached house late on Friday night.
Irish police say they found no evidence of anyone in the house at the time the children died, and there were no signs of a break-in at the property.
According to The Sun, Gardai suspect the three children may have been "drugged" or "poisoned". She is receiving medical treatment in Tallaght University Hospital.
A police spokeswoman said: "Gardaí are now attending the scene of an incident at a domestic house in Newcastle, Co".
A postmortem is due to take place later today to determine cause of death.
Speaking to the Associated Press, local councillor Emer Higgins described the incident as an "unimaginable tragedy".
'My thoughts are with everybody impacted, ' said the Fine Gael representative.
"It's so tragic. It's unbelievable that three young people's lives could be cut short like that, in what seems to be a particularly tragic case".
Anyone with information in relation to this incident is asked to contact Clondalkin Garda station on 01-666 7600.