There have been no official estimates of membership of the organization . The group 's closed Facebook group had 641 members before it was removed . Participants at events and demonstrations have ranged from 40 to 150 . Most of the leadership of the group have long criminal backgrounds with multiple arrests or convictions . The Norwegian Police Security Service ( PST ) and the Section for organised crime in the Oslo Police district are co-operating to monitor this group . Several of the group 's members have travelled to Syria to fight for ISIL . Hassan Abdi Dhuhulow , one of the perpetrators of the 2013 Westgate shopping mall attack in Kenya had contacts with central members of the group
Westgate shopping mall attack
Westgate shopping mall attack
Profetens Ummah