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". 
 
 Similar suicide attacks would continue, he added, speaking in Russian. 
 
 Mr Umarov is self-styled leader of the "Caucasus Emirate" and is considered the head of the Islamist militant insurgency in the North Caucasus. He is one of the few prominent Chechen rebels still active, having served as security minister in the Chechen separatist government from 1996-99. 
 
 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. 
 
 Analysis Doku Umarov's claim that he ordered the Domodedovo bombing will not come as a surprise to Russians. The Chechen warlord has been linked to previous acts of terror. But his declaration that there are hundreds more suicide bombers ready to strike at any moment will spread fear across the country. Following the Domodedovo bomb, the authorities have taken measures to prevent similar attacks. As of 1 February, there are new security regulations at Russian airports. It means tighter controls outside airport buildings and more document checks. One Russian newspaper this morning warned passengers to arrive four hours before a flight. It also predicted that it would be harder for individuals without valid air tickets to get access to the terminals. What's more, a string of law enforcement officials have been sacked and a new head of transport security has been appointed in the Interior Ministry. But few Russians believe that these measures will prevent future terror attacks and provide them security. 
 
 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." 
 
 He goes on to argue that Muslims are under attack all over the world, talking at length about the situation in Sudan, and condemns "Zionist and Christian regimes led by Israel and America". 
 
 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". 
 
 Promising "regular, deeper and more aggressive operations", he says he wishes that so much blood did not have to be spilt for Russia to "leave the Caucasus". 
 
 'Special operation' 
 
 Image copyright Reuters Image caption Doku Umarov was flanked by two men in an earlier video. 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. 
 
 Although the attacker has not been named officially, unnamed officials told the Interfax news agency on Sunday that he was believed to be Magomed Yevloyev from a village in Ingushetia in the northern Caucasus. 
 
 In the video of Doku Umarov posted last Friday, the rebel leader is flanked by two men, one of whom the rebel leader claims is preparing a "special operation". Russian media have suggested that the man in the video, named "Seifullah" by Mr Umarov, was Yevloyev. 
 
 At least seven foreigners were killed in the bombing at the airport - the busiest serving the Russian capital. The arrivals hall was full of people as several international flights had just landed. 
 
 Those killed included one person each from Britain, Germany, Austria, Ukraine, Tajikistan, Kyrgyzstan and Uzbekistan. At least 16 Russians were also among the dead. 
 
 Russian President Dmitry Medvedev sacked several officials - said to include a regional transport chief and a Moscow police deputy head - after the bombing, blaming them for poor security. ||||| 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 Kavkaz Center website says it received the video late Monday. It was not clear when or where the video was recorded. 
 
 The Jan. 24 attack at Moscow's Domodedovo Airport killed 36 people. Russian investigators say the bomber was a 20-year-old man from the Caucasus region that includes Chechnya, but have not released his name or other details. 
 
 "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, wearing a camouflage uniform and a skullcap. 
 
 "Among us there are hundreds of brothers who are prepared to sacrifice themselves" in further attacks, Umarov says in the video. "We can at any time carry out operations where we want." 
 
 Over the weekend, the website released another video in which Umarov also threatened more attacks, saying 2011 would be "the year of blood and tears." 
 
 Chechen rebels have fought two full-scale wars against Russian forces since 1994. Major offensives in the second war died down about a decade ago, but the insurgency has continued with small clashes in Chechnya and in neighboring Caucasus republics. 
 
 The rebels have claimed responsibility for an array of terrorist attacks, including last year's double suicide bombing of the Moscow subway system that killed 40 people. 
 
 Umarov, who seeks to create a Caucasus emirate independent from Russia and governed by Sharia law, said in the earlier video that he could call on 50 to 60 suicide bombers if necessary. 
 
 The blast at Domodedovo, south of the Russian capital, raised strong concerns about Russia's strategy against the insurgents and about its ability to protect against future attacks. The day after the bombing, President Dmitry Medvedev said that terrorist attacks in the country increased in 2010, although he did not cite figures. 
 
 The bomb went off in the waiting hall of the international arrivals area at the airport. As in many other airports, there were no security procedures to go through in order to get into that area. 
 
 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. 
 
 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. 
 
 The attack took place as Medvedev was preparing to speak at the prestigious World Economic Forum in Davos, Switzerland, where he hoped to reassure foreign investors that Russia was safe and attractive. 
 
 The bombing forced him to make an abbreviated trip to Davos, where he declared that the attack would not crush Russia or its drive for investment.
– 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.