According to RIA Novosti's source within the Russian special forces, information about a planned terrorist attack along the route of the "Sapsan" was obtained by the FSB from an informer embedded within the North Kavkaz terror network.
According to the source, the conscripted agent informed the FSB that leaders of the Dagestan terror network sent Islam Hamuzhev, a resident of Kabardino-Balkariya, to Moscow for the execution of the planned act. Prior to his departure, Islam completed a bomb-making course in a terrorist camp in Dagestan.
Hamuzhev's plan, when in Moscow, was to find like-minded persons to execute the act together. Thanks to the informant's actions, all of Hamuzhev's movements, mail, and telephone calls were monitored from the moment of his arrival in Moscow.
The director of FSB, Aleksandr Bortnikov, publicized the news of the discovery of the plot on the 18th of July, 2011. On the 15th of August the paper "Komersant" published an article that identified the terror act's target as the "Sapsan" train on the route between Moscow and St. Petersburg.
Hamuzhev recruited three people in Moscow to assist him in the execution of the terror act: Murad Edil'biev, Murad Umayev, and Farita Nevlyutova. A bomb with the equivalent force of 10 kg TNT was manufactured from fertilizer. The location for the explosion was chosen to be a section of the route near Khimky.
In the beginning of June Khamuzhev informed his assistants that he plans to leave Moscow and tasked them with finishing the deed. When attempting to depart for Kabardino-Balkariya, Khamuzhev was arrested. Some time later, Edil'biev was apprehended while attempting to dispose of the bomb in a nearby park. Subsequently, the rest of the conspirators were arrested as well.
According to RIA Novosti's source, the observations obtained in the Khamuzhev case indicate that the successful execution of such a terror attack is nearly impossible to stop without preventative measures.
[translated from Russian by me]
