Three men have been arrested as part of the investigation into the murders of a four-year-old boy and his grand-aunt in Co Offaly last year.
Tadgh Farrell and 60-year-old Mary Holt died in a fire at a house in Castleview Park in Edenderry, after a petrol bomb was thrown through the front window on 6 December.
Tadgh was visiting his grandmother and his grand-aunt at the time of the attack.
His and Ms Holt's remains were discovered in the front room, where the fire was deliberately started.
Tadgh's grandmother Pauline Holt was also in the house and was seriously injured in the fire.
Gardaí say they arrested two men in their 20s and one in his 30s as part of the investigation this afternoon.
The men are being held for questioning at garda stations across the midlands, under section 50 of the Criminal Justice Act.
They can be held for questioning for up to seven days.
