Umarov, 46, speaking in a video carried by the Islamist website www.Kavkazcenter.com, said there would be further such attacks in pursuit of an independent Muslim state in Russia's Caucasus region -- a territory embracing Chechnya, Dagestan and other nearby territories.
He described the attack on Moscow's Domodedovo airport on January 24 as a "special operation" directed against the Russian people and its prime minister, Vladimir Putin. Umarov appeared in the video, made on the day of the attack, wearing combat fatigues.
(Writing by Ralph Boulton, editing by Tim Pearce)
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