The Report outlined five possible motives for the murder: a belief Litvinenko had betrayed the FSB through public disclosures about its work; a belief that he was working for British intelligence; because he was a prominent associate of leading opponents of Mr Putin and his regime, including Mr Boris Berezovsky and Akhmed Zakayev; because his claims about the FSB were "areas of particular sensitivity to the Putin administration", including a plot to murder dissident Boris Berezovsky; and because there was “undoubtedly a personal dimension to the antagonism" between Litvinenko and Putin, culminating in his allegation that Putin was a paedophile.