The leader of the rebel Islamic Emirate of the Caucasus, Chechen, Doku Umarov, claimed Monday night's suicide bombing in Moscow-Domodedovo airport, which killed 36 people on January 24, in a video posted on the site Kavkazcenter. com.
"This special operation (at the airport on January 24) was done on my orders," he said in this video, where he threatened to carry out further attacks.
Saturday, Doku Umarov had already promised to make 2011 a year "blood and tears" to Russia in another video posted on the internet.
In the latest video, made, he said, the day of the attack at the airport, January 24, Doku Umarov said it had acted on behalf of Allah and in order to create a free Islamic state in the North Caucasus .
The operation is a response to crimes of Russia in the Caucasus, says it in this video where he appears alone wearing camouflage.
This is the second attack in the capital Moscow in less than a year. In March 2010, a double suicide bombing in Moscow metro has already killed 40 people.
And Doku Umarov, alias Abu Oussman, had also claimed responsibility for deadly attacks and said it was an act of "revenge" operations of Russian forces in the Caucasus, in another video posted on the site.
Regarding the attack at the airport Domodedovo, Russian investigative committee has so far indicated that the bomber responsible for the suicide bombing, was a 20 year old man originally from the North Caucasus region of southern Russia plagued by Islamist rebellion.
He also said that the attack, which took place in the international arrivals area of the airport, was intended primarily to kill foreigners.
A source within the Russian security forces said last week the Interfax news agency that the suicide bomber was Magomed Yevloyev, 20, son of a schoolteacher and a bus driver originating in the unstable republic of Ingushetia, bordering Chechnya.
In a survey published Friday, the Russian tabloid reported that Tvoya Dien Magomed Yevloyev had left for military service in November 2009 in Vladivostok (Far East), but he returned after three months of being reformed to health reasons.
Shortly after the explosion at the arrival terminal for international flights from Moscow Domodedovo, the family, which also has three daughters and one son, left the village after receiving a visit from members of the Federal Security Service ( FSB), the newspaper said.
Sunday, the Russian police launched a search against two men allegedly involved in the attack at the airport and come from Ingushetia, as the suspected suicide bomber, police said.
"A review of research has been launched against two young men who disappeared from the village of Ali-Yurt (Ingushetia) at about the same time as Magomed Yevloyev, who, according to preliminary data, triggered the explosive device at Domodedovo , "the source said the agency Interfax.
After the first Chechen war (1994-1996) between Russian forces and separatist rebellion has gradually Islamized and has increasingly spilled over the borders Chechnya to become the mid-2000s in an armed Islamist movement active in all the North Caucasus.
"The Emirate of Caucasus", in addition to attacks at Moscow airport Domodedovo in the Moscow metro and in March, claimed the attack in November 2009 against a passenger train from Moscow to Saint Petersburg (28 dead ) and another car bomb in September 2010 at a market in Vladikavkaz in North Ossetia (17 dead).