The blast occurred at about 08:32 MSK on 6 February 2004 inside a subway car while it was moving in the tunnel near Avtozavodskaya station, on the metro system's Zamoskvoretskaya Line.

[8] According to the statement, the group launched the attack to mark the fourth anniversary of the killing of scores of Chechen civilians by Russian soldiers in Grozny in the Novye Aldi massacre.

[9] In May 2005, Tambiy Khubiyev and Maksim Panaryin (from the Karachay-Cherkess Republic[10]) along with Murat Shavayev (a native of Kabardino-Balkaria[10]) were arrested by Russian law enforcement agencies in connection with terrorist attacks in Moscow, Voronezh, and Krasnodar.

[5] Khubiyev confessed to organizing the bombings near Avtozavodskaya and Rizhskaya subway stations in Moscow[5] and a series of explosions in Krasnodar in August 2003.

Khubiyev also linked Shavayev to the Rizhskaya station bombing in August 2004, stating that the latter had smuggled IED parts to Moscow prior to the attack.