This 2002 letter from A.K. Ivanov, 1st Deputy Chief of the Moscow GUVD, to State Duma Deputy Sergei Kovalev responds to inquiries regarding the 1999 apartment bombings. Ivanov confirms that significant quantities of explosives were discovered on September 13, 1999, at 16 Borisovskie Prudy St. and 70 Krasnodarskaya St. The document reveals that a 'Gazelle' driver who delivered the explosives, sourced from a 'Mercedes' trailer at the 51st kilometer of the MKAD, provided key information. The resulting criminal case (No. 103), which encompasses the Guryanova Street and Kashirskoye Highway bombings, is noted as being under the jurisdiction of the FSB Investigative Directorate. Ivanov also addresses media discrepancies, asserting that an 'Echo of Moscow' report about explosives in 'Proyektiruemyi Proyezd' actually described the Krasnodarskaya Street seizure.