A Chechen separatist leader has claimed responsibility for last month's deadly suicide attack at Moscow's busiest airport.
    
In a video posted online late Monday, Doku Umarov said he ordered the Jan. 24 bombing that killed 36 people at Domodedovo Airport and injured 180.
    
The 46-year-old Chechen warlord also warned there would be more attacks and promised Russians to make 2011 a year of "blood and tears."
     
Umarov is the leader of a group dedicated to the creation an independent Muslim state in Russia's Caucasus region.

Three days prior to the January attack, Russia's Prime Minister Vladimir Putin said the way to combat terrorism in Caucasus was to improve the quality of life of the region's residents.

"Our objective is to radically change the situation in the North Caucasus, primarily by improving the quality of life of the people, ensuring their security and giving them the opportunity to work and live in peace," Putin said.

"We must eradicate the roots of terrorism and extremism, first of all poverty, unemployment, ignorance and inadequate levels of education, and corruption and lawlessness," he concluded.