Media playback is unsupported on your device Media caption Doku Umarov: "We can carry out these operations whenever and wherever we want" 
 
 One of Russia's most wanted men, Chechen warlord Doku Umarov, has said he ordered the deadly bomb attack last month on a Moscow airport. The suicide attack on the arrivals area of Domodedovo international airport on 24 January left 36 people dead and 180 injured. In a video posted online, Mr Umarov said the attack was a response to "Russian crimes in the Caucasus". Another video of the rebel leader was posted online late on Friday last week in which he threatened a year of "blood and tears" but made no explicit reference to the airport bombing. Medvedev initially lashed out at airport management for poorly guarding the area, but the airport's operator responded that the Russian transport police are responsible for security in that part of the airport. Doku Umarov has previously claimed the March 2010 suicide bombings on the Moscow Metro in which 39 people died, and is said to have ordered the November 2009 bombing of a train from Moscow to St Petersburg that left 26 dead. 'On my orders' 
 
 The video which appeared on the Kavkaz Tsentr website is dated 24 January, the day of the attack. Appearing alone, dressed in combat fatigues, Mr Umarov speaks to the camera: "This special operation was carried out on my orders and, God willing, special operations like it will continue to be carried out." Mr Umarov says that he and his fighters "are waging jihad in the Caucasus today to establish the word of Allah", and there are "hundreds more brothers" ready to sacrifice themselves to that end, in the fight with Russia's "racist regime". The younger man (R) is named "Seifullah" 
 
 Russian investigators say the suicide bomber who struck at Domodedovo Airport was a 20-year-old man from the North Caucasus.  A website affiliated with Chechen rebels has released a video in which insurgent leader Doku Umarov claims responsibility for last month's deadly suicide bombing at Russia's largest airport and threatens more bloodshed if Russia does not leave the region. The bomb went off in the waiting hall of the international arrivals area at the airport. In the next few days, Medvedev fired several top transport police officials and ordered heightened security measures at all the country's main transport hubs, including major railway stations.
– A Chechen militant leader has claimed responsibility for the bombing that killed 36 people at Russia's biggest airport last month. Warlord Doku Umarov appears in a 16-minute video posted online in which he says the suicide bombing at Moscow's Domodedovo airport was carried out on his orders and warns of more attacks to come, AP reports. "You see this special operation carried out by my order. More special operations will be carried out in the future," Umarov says in the video. "Among us there are hundreds of brothers who are prepared to sacrifice themselves" in further attacks. "We can at any time carry out operations where we want," he adds. Chechen rebels, who seek to establish an independent Islamic state in the Caucasus, also claimed responsibility for the Moscow subway bombing last year.