Results of the post mortem are not being released.
Post mortem exams have been completed on the remains of a young boy and his grandaunt killed in an arson attack in Offaly at the weekend.
Four year old Tadgh Farrell and Mary Holt died after a suspected petrol bomb attack at a house in Castleview Park in Edenderry on Saturday night.
Gardaí say they are not releasing the results of the post-mortem exams for operational reasons.
Chief Superintendent Anthony Lonergan says extensive investigations are being carried out:
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