A man has been arrested in connection with a triple murder investigation in Co Kildare 30 years ago.
Twenty-year-old Barbara Doyle and her nieces Mary Ellen Byrne who was eight and Kerry Byrne who was three, died in a house fire on Church Lane in Kilcock on September 20, 1987.
Last week gardaí upgraded their investigation on foot of new evidence.
A man in his 50s was arrested this afternoon in north county Dublin.
He is currently being questioned at Leixlip garda station under Section 4 of the Criminal Justice Act, where he can be held for up to 24 hours.