Some have criticized the decision to hold the summit in Northern Ireland, due to ongoing protests and small-scale violence by both republicans and loyalists.[9] Since the Provisional IRA called a ceasefire at the end of the Troubles, dissident republican splinter groups have continued its paramilitary campaign. The main groups involved in this low-intensity campaign are the Real IRA, Continuity IRA and Óglaigh na hÉireann. Security sources expected that these groups would try to launch an attack during the summit, which "would hijack global headlines".[10]