The Emergency Response Unit was called to Utøya island and subsequently apprehended Anders Behring Breivik , the perpetrator of the 2011 Norway attacks in Oslo and Utøya on 22 July 2011 . In the aftermath , they received further anti-terrorist training from Ireland 's national police tactical intervention unit , also named the Emergency Response Unit ( ERU ) of the '' Garda Síochána ''
2011 Norway attacks
2011 Norway attacks
Emergency Response Unit (Norway)