More than 20,000 march through Moscow to protest against the killing of Russian opposition leader Boris Nemtsov . Vast crowds of mourners and activists waved flags and held placards which read : ' I am not afraid ' Protest comes Friday after Mr Nemtsov was shot dead in 'contract hit ' as he walked along bridge near the Kremlin . CCTV footage shows person approaching Mr Nemtsov , shooting him and escaping in a nearby getaway car . Widow of murdered Russian spy Alexander Litvinenko says she had 'no doubt ' killing was politically motivated . Meanwhile dozens gather outside the Russian Embassy in London to protests against Putin government .
More than 20,000 march through Moscow to protest against the killing of Russian opposition leader Boris Nemtsov . Vast crowds of mourners and activists waved flags and held placards which read : ' I am not afraid ' Protest comes two days after Mr Nemtsov was shot dead in 'contract hit ' as he walked along bridge near the Kremlin . CCTV footage shows person approaching Mr Nemtsov , shooting him and escaping in a nearby getaway car . Widow of murdered Russian spy Alexander Litvinenko says she had 'no doubt ' killing was politically motivated . Meanwhile dozens gather outside the Russian Embassy in London to protests against Putin government .