Three people have been arrested as part of a joint Garda / PSNI investigation into dissident republican activity.
A 19-year-old man and an 18-year-old woman originally from Dundalk were arrested in Forkhill area of south Armagh. They are being detained by the PSNI.
Meanwhile as part of the same operation into the formation of a new IRA alliance, gardaí detained a 43-year-old man in the Kilcurry area of Dundalk.
He is being questioned at Drogheda Garda station under Section 30 of the Offences Against the State Act.