Gardaí have arrested a woman in connection with the investigation into the disappearance of Daniel Aruebose, the child who went missing in north Co Dublin more than four years ago.
The woman, who is in her 20s, was arrested this morning on suspicion of murder and is being held at a Dublin garda station.
She is being detained under Section Four of the Criminal Justice Act and can be questioned for up to 24 hours.
Gardaí upgraded the investigation to homicide earlier this month.
The woman is the first person to be arrested as part of this investigation.
Daniel Aruebose was last seen alive at his home in The Gallery apartments in Donabate more than four-and-a-half years ago when he was just three years old.
Daniel's death and secret burial had been concealed until a check on social welfare payments first raised concerns at the Department of Social Protection for his safety and whereabouts.
The department alerted Tusla who contacted the gardaí.
They commenced a search of waste ground near his home in Donabate and the skeletal remains of the child were discovered after two-and-a-half weeks.
He was formally identified on 17 September.
Daniel's foster family who looked after him for the first year-and-a-half of his life have been devastated by his disappearance and say they never forgot him and always missed him.
The results of the post-mortem examination were inconclusive as to the cause of Daniel's death and the child's remains are still with the coroner and have not yet been released for burial.
The investigation into the disappearance of the little boy began as a missing person's case.
However, ten days ago, on the eve of what would have been Daniel’s 8th birthday, gardaí announced that the case had been upgraded to a homicide investigation.
Gardaí believe that Daniel died because of the actions of another person, that he did not die from natural causes and that he could have been murdered.
The change in the designation of the investigation released a number of powers to gardaí, including the power to seek warrants in court to carry out searches and arrest suspects and interview them under caution.
Gardaí say they are also continuing to appeal to anyone with information to contact Swords Garda Station on 01 666 4700, the Garda Confidential Line on 1800 666 111 or any garda station.