The blaze broke out in Edenderry this morning.
One person is dead after a fire at a house in Offaly, at the same address where a woman and child were killed last year.
Emergency services were called to the scene at Castleview Park in Edenderry in the early hours of this morning.
The blaze was put out and the body of an adult found inside.
The person hasn't yet been identified.
Gardai say they are investigating the circumstances of the fire and are appealing for anyone with information to come forward.
Mary Holt and Tadgh Farrell were murdered in a fire bomb attack at the house last December.
Irish Times Crime Editor Conor Lally says this morning's fatal blaze could be linked to organised crime:
Anyone with information is asked to contact Tullamore Garda Station on 057 932 7600, the Garda Confidential Line 1800 666 111 or any Garda Station.
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