was found and defused in an apartment block in the Russian city of Ryazan on 22 September, which was then explained to be an exercise by the Russian security services, the FSB. An official investigation of the bombings was completed only three years later, in 2002. Seven suspects were killed, six have been convicted on terrorism-related charges, and one remains a fugitive. According to the investigation, the Moscow and Volgodonsk bombings were organized and led by Achemez Gochiyaev, who headed a group of Karachai Wahhabis, while the Buinaksk bombing was organized and perpetrated by a different group of Dagestani Wahhabis. The Russian Duma rejected two motions for parliamentary investigation of the Ryazan incident. An independent public commission to investigate the bombings chaired by Duma deputy Sergei Kovalev was rendered ineffective because of government refusal to respond to its inquiries. Two key members of the Kovalev Commission, Sergei Yushenkov and Yuri Shchekochikhin, both Duma members, have since died in assassinations in April 2003 and July 2003 respectively. The commission's lawyer Mikhail Trepashkin was arrested in October 2003 to become one of the better-known political prisoners in Russia. More recent attacks 2002 The Moscow theater hostage crisis (also known as the 2002 Nord-Ost siege) was the seizure of a crowded Dubrovka Theater by 40 to 50 armed Chechens on 23 October 2002 that involved 850 hostages and ended with the deaths of at least 170 people. 2004 In September 2004, following bombing attacks on two aircraft and the downtown Moscow Metro, Chechen terrorists seized over 1,000 hostages at a school in Beslan, North Ossetia. 2006 The 2006 Moscow market bombing occurred on 21 August 2006, when a self-made bomb with the power of more than 1 kg of TNT exploded at Moscow's Cherkizovsky Market frequented by foreign merchants. The bombing killed 13 people and injured 47. In 2008, eight members of the neo-Nazi organization The Saviour were sentenced for their roles in the attack. 2010 In March 2010 suicide bombings were carried out by two women who were aligned with Caucasus Emirate and Al-Qaeda. The terrorist attack happened during the morning rush hour of 29 March 2010, at two stations of the Moscow Metro (Lubyanka and Park Kultury), with roughly 40 minutes interval between. At least 38 people were killed, and over 60 injured. 2011 The Domodedovo International Airport bombing was a suicide bombing in the international arrival hall of Moscow's Domodedovo