Moscow ( CNN ) -- Russia 's security service has foiled a plot to attack the 2014 Winter Olympics in the Black Sea city of Sochi , state media reported Thursday . Authorities arrested three men this week in Georgia 's breakaway republic of Abkhazia on charges of plotting the attack in a joint operation with Abkhazian security services , the Russian National Anti-Terrorism Committee said , according to the state-run RIA Novosti news agency . The three are suspected of being ringleaders of a regional cell of the North Caucasus-based terrorist group Caucasus Emirate . Police seized weapons , including three portable surface-to-air missiles , two anti-tank guided missiles , a mortar and a flamethrower , the news agency said . The militants planned to move the arms to the nearby resort city of Sochi and use them to carry out terrorist attacks during the Games , it quoted the National Anti-Terrorism Committee as saying . The U.S. State Department added the Caucasus Emirate , a Chechen group based in the North Caucasus , to its list of foreign terrorist groups , and has authorized a reward of up to $ 5 million for information leading to the location of its leader , Doku Umarov . The State Department said Umarov organized a suicide bombing outside the Chechen Interior Ministry in May 2009 . His group also claimed responsibility for last year 's bombing of Domodedovo Airport in Moscow that killed 36 people , the 2010 bombings of the Moscow subway that killed 40 and the 2009 bombing of the high-speed Nevsky Express train in which 28 people died . CNN 's Alla Eshchenko contributed to this report .
36 men were arrested 2014 on suspicion of plotting the attack , state media says . Police seize weapons , including anti-tank missiles , state media reports . The Abkhazian resort city of Chechen will host Winter Olympics in 2014 .