>On 13 September, just hours after the second explosion in Moscow, Russian Duma speaker Gennadiy Seleznyov of the Communist Party made an announcement, "I have just received a report. According to information from Rostov-on-Don, an apartment building in the city of Volgodonsk was blown up last night."[59][60][61][62][63] When the Volgodonsk bombing happened on 16 September, Vladimir Zhirinovsky questioned Seleznyov in the Duma the following day, but Seleznyov turned his microphone off.[59] Later, Seleznyov said it was a misunderstanding.[64][65] >Alexander Litvinenko believed that someone had mixed up the order of the blasts, "the usual Kontora mess up". According to Litvinenko, "Moscow-2 was on the 13th and Volgodonsk on 16th, but they got it to the speaker the other way around". Investigator Mikhail Trepashkin said that the man who gave Seleznyov the note was indeed an FSB officer.[69]>Former FSB agent Alexander Litvinenko, who blamed the FSB for the bombings and was a critic of Putin, was assassinated in London in 2006. A British inquiry later determined that Litvinenko's murder was "probably" carried out with the approval of Vladimir Putin and Nikolai Patrushev.[23]
> A suspicious device resembling those used in the bombings was found and defused in an apartment block in the Russian city of Ryazan on 22 September.[3][4]... Three Russian Federal Security Service (FSB) agents who had planted the devices at Ryazan were arrested by the local police.[6] The next day, FSB director Nikolai Patrushev announced that the incident in Ryazan had been an anti-terror drill and the device found there contained only sugar, and freed the FSB agents involved.[7]
