A body has been discovered following a fire at the same Co Offaly home in which a boy and his great-aunt died in an arson attack in December.
Gardai said they are investigating “all the circumstances” of the fire at Castleview Park in Edenderry.
Emergency services attended the fire in the early hours of Tuesday morning and remain at the scene.
An Garda Siochana said: “The body of an adult person has been discovered inside the premises.
“A post-mortem will be conducted to determine the cause of death, which will determine the course of any Garda investigation.”
The scene has been preserved for forensic examination and gardai are appealing for any person with any information on the fire to contact them.
The incident occurred at the same house where four-year-old Tadhg Farrell and his great-aunt Mary Holt were murdered in December 2025.
The young boy’s grandmother also received hospital treatment for serious burn injuries in that first blaze.
A man in his late 20s who had been detained on suspicion of murder was released without charge in January.
Speaking at the scene of the fire on Tuesday morning, local councillor Fergus McDonnell said neighbours were alerted by their smoke alarms going off.
He said the fire was “intense” and has described what happened as “horrendous”, adding that the local community “can’t comprehend” a second fatal fire has happened at the same house.
“People just don’t know what to think,” he said.
On Tuesday afternoon, Gardai were carrying out door-to-door inquiries and fingertip searches in the vicinity of the house.
Investigators accessed the top floor of the house through the upstairs windows using a ladder.
