In June 2009, Murray accepted an invitation to a debate with Anjem Choudary, leader of the banned group Al-Muhajiroun, on the subject of Sharia law and British law at Conway Hall. Members of Al-Muhajiroun acying as security guards tried to segregate men and women at the entrance of the event. Clashes broke out near the entrance between Choudary's and Murray's supporters and Conway Hall cancelled the debate because of the attempted forced separation of men and women. Outside the building, a confrontation between Choudary and Murray over the cancellation of the event occurred. Murray's Centre for Social Cohesion later published a study arguing that one in seven Islam-related terrorist cases in the UK could be linked to Al-Muhajiroun,