The remains of the boy, who would now be eight years old, were found during a search of open ground in Donabate in September.
A woman in her 20s has been arrested on suspicion of the murder of Daniel Aruebose.
The remains of the boy, who would now be eight years old, were found during a search of open ground in Donabate in September.
He had been missing for four years, and a homicide investigation was launched earlier this month.
A woman was arrested as part of the investigation this morning, and is being held at a Garda station in Dublin.
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