A woman in her 50s has been arrested in relation to the fatal house fire in Co. Roscommon last week, which claimed the life of a five-year-old girl.
She is the fourth person to be arrested in the investigation and is being held at Boyle police station. She has been detained under Section 30 of the Offences Against the State Act 1939.
A man in his 30s was arrested on Tuesday in Co. Sligo and remains in police custody. Last week a man and a woman, both in their 30s were also detained in relation to the deadly blaze.
Irish family torn apart by arson house attack that killed five-year-old
Arson attack on Benburb monastery, Tyrone, 'nasty and vicious'
Ten-year-old boy questioned over raging fires in Irish hills
The victim of the suspected arson attack, Mari Connolly, died after a fire broke out at her fathers home, a day after her mother gave birth to twins.
The five-year-old was found dead in the upstairs bedroom of the terraced home after the fire ripped through the home in the middle of the night on October 3.
Her father, Richard (27), is understood to have escaped the fire having leapt from the window of an upstairs bedroom, with his two other daughters, aged six and eight, in his arms.
His former partner, Mari’s mother, Teresa Keane, had given birth to twins the previous day.
Massive, record-setting waves recorded off of Irish coast during Ophelia