Photo Gallery Mourning in Moscow
Moscow is in a state of shock after Monday's bomb attack which killed 39 people. Here, a woman cries at Lubyanka station, one of the two stations targeted in the attack.
A woman stands by floral tributes at the Park Kultury subway station: The attacks happened during rush hour on Monday morning.
Moscow residents lit candles in memory of the victims at the Lubyanka metro station on Monday. The station is located beneath the headquarters of the Federal Security Service (FSB), Russia's primary domestic security agency.
Moscow declared Tuesday an official day of mourning. Here, relatives of victims are seen outside a morgue on Tuesday where they have come to identify a body.
A woman prays next to flowers in Lubyanka metro station.
A security camera image shows firefighters in Lubyanka station rushing to the scene after the explosion on Monday.
Russian Prime Minister Vladimir Putin visited survivors of the attack in a Moscow hospital on Monday.
Russian President Dmitry Medvedev lays flowers inside Lubyanka metro station on Monday. "Russia will fight terrorism without hesitation and to the end," Medvedev said.
The Moscow metro was running again by Monday evening. Here, commuters wait in Lubyanka station on Tuesday morning.
Lubyanka metro station: Russian intelligence suspect that groups in the North Caucasus may be behind the attacks.
The Moscow metro has been the target of attacks by Chechen separatists in the past. A February 2004 bombing killed 39 people.
Flags fly at half-mast over the Kremlin on Tuesday.
Russians donate blood in Moscow for the victims of Monday's terror attacks.