Dhuhulow is the subject of the 2015 book '' En norsk terrorist . Portrett av den nye ekstremismen '' ( A Norwegian terrorist . Portrait of the new extremism ) by journalist Lars Akerhaug , who has directed strong criticism towards Norwegian authorities for their failed handling of Dhuhulow and " cowardice " prior to the attack , requesting a fact-finding commission similar to the one after the 2011 Norway attacks , believing that the victims of the Westgate attack deserve an explanation from Norwegian authorities . Researcher Stig Jarle Hansen has voiced similar concerns , holding that the issue of Norwegian Al-Shabaab-fighters is taken too lightly in Norway ( the number of fighters is the same as the United Kingdom despite many more Somalis living there ) . Dhuhulow was the subject of a BBC '' Newsnight '' report that aired on 17 October 2013 , and of the NRK '' Brennpunkt '' documentary '' Terroristen fra Larvik '' ( The terrorist from Larvik ) aired on 21 October 2014 . He is considered Norway 's worst terrorist after Anders Behring Breivik
2011 Norway attacks
2011 Norway attacks
Hassan Abdi Dhuhulow