Russian President Vladimir Putin has acknowledged for the first time that radical Islamists carried out Friday's attack on a concert hall near Moscow that killed more than 130 people. Four men from Tajikistan have now been charged with carrying out an act of terrorism after appearing before a Moscow court on Sunday. In the wake of the massacre, Putin accused Ukraine of being involved - even as a branch of the so-called Islamic State claimed it was responsibile for the assault. In remarks at a Kremlin meeting, Putin said the attack intended to sow panic among Russians. Chapters: 0:00 Putin's new acknowledgement 1:27 Roman Goncharenko, DW Eastern Europe Editor 4:42 Juri Rescheto, DW Riga Bureau Chief 8:53 Orysia Lutsevych, Chatham House Russia and Eurasia Programme Subscribe: null For more news go to: http://www.dw.com/en/ Follow DW on social media: ►Facebook: https://www.facebook.com/deutschewellenews/ ►Twitter: https://twitter.com/dwnews ►Instagram: https://www.instagram.com/dwnews ►Twitch: https://www.twitch.tv/dwnews_hangout Für Videos in deutscher Sprache besuchen Sie: null #putin #isis #islamist