In 2011 , the FSB prevented 94 " crimes of a terrorist nature " , including eight terrorist attacks . In particular , the agency foiled a planned suicide bombing in Moscow on New Year 's Eve . However , the agency failed to prevent terrorists perpetrating the Domodedovo International Airport bombing . Over the years , FSB and affiliated state security organizations have killed all presidents of the separatist Chechen Republic of Ichkeria including Dzhokhar Dudaev , Zelimkhan Yandarbiev , Aslan Maskhadov , and Abdul-Khalim Saidullaev . Just before his death , Saidullaev claimed that the Russian government " treacherously " killed Maskhadov , after inviting him to " talks " and promising his security " at the highest level " . During the Moscow theater hostage crisis and Beslan school hostage crisis , all hostage takers were killed on the spot by FSB spetsnaz forces . Only one of the suspects , Nur-Pashi Kulayev , survived and was convicted later by the court . It is reported that more than 100 leaders of terrorist groups have been killed during 119 operations on North Caucasus during 2006 . On 28 July 2006 the FSB presented a list of 17 terrorist organizations recognized by the Supreme Court of the Russian Federation , to '' Rossiyskaya Gazeta '' newspaper , which published the list that day . The list had been available previously , but only through individual request . Commenting on the list , Yuri Sapunov , head of anti-terrorism at the FSB , named three main criteria necessary for organizations to be listed
Moscow theater hostage crisis
Moscow theater hostage crisis
Federal Security Service