Gardaí have arrested a man in his late 20s as part of the investigation into the murder of Keane Mulready-Woods.
The man is being detained at a garda station in Dublin for questioning.
Three men arrested earlier this week as part of the investigation have been released without charge.
A file will be prepared for the DPP.
17-year-old Keane Mulready-Woods from Drogheda in Co Louth was last seen on 12 January, 2020.
His dismembered remains were later found at various locations in Dublin and Drogheda.