Former FSB officer Aleksander Litvinenko and investigator Mikhail Trepashkin alleged that a Chechen FSB agent directed the Moscow theater hostage crisis in 2002 . International and Russian journalists accused the FSB of staging many terrorism acts , such as a market-place bombing in the city of Astrakhan in 2001 , bus-stop bombings in the city of Voronezh , and the blowing up the Moscow-Grozny train , whereas innocent people were convicted or killed . Journalist Boris Stomakhin claimed that a bombing in Moscow metro in 2004 was probably organized by FSB agents rather than by the unknown man who called the Kavkaz Center and claimed his responsibility . Stomakhin was arrested and imprisoned to five years of prison for inciting hatred and defamatory statements aimed at groups and persons of particular religious and ethnic background and for promoting violent change of constitutional regime and violation of territorial integrity of Russian Federation ( articles 280 and 282 of the Russian Criminal Code )
Moscow theater hostage crisis
Moscow theater hostage crisis
Terrorism in Russia