Barbara Doyle (20), Mary Ellen Byrne (8) and Kerrie Anne Byrne (3) all lost their live in the blaze.
Gardaí are renewing their appeal for information on a fatal house fire started on this day 32 years ago.
The fatal fire occurred on September 20th 1987, at Church Lane, Kilcock in Kildare.
20-year-old Barbara Doyle, eight-year-old Mary Ellen Byrne and three-year-old Kerrie Anne Byrne all lost their live in the blaze.
The children's parents went to a 21st birthday party on the night in question and Barbara - an aunt of the two girls - was babysitting them.
Between 3am and 4am that Sunday morning, a fire was reported at the house and claimed the lives of the three.
New evidence was presented to Gardaí two years ago and they now believe that the fire was started deliberately.
An incident room has been set up at Leixlip Garda Station and the investigation was upgraded to a murder investigation.
Gardaí firmly believe that there are persons in the community who have information in relation to this fire and are appealing to any person who has any information to contact Leixlip Garda station at 01-6667800 or the Garda Confidential Line on 1800 666 111.
The public are asked to respect the privacy of the Byrne and Doyle families.