12 people die in the suicide atack in Russia's Caucasus region Dagestan right after the bombings on Moscow's metro.
A car bomb was detonated at about 8.30 in the morning outside the offices of the local interior ministry and the FSB security agency and after 20mts another bomb blast happened when the crowd was more at the same place.
Russia is on a high alert after the twin bombings which killed around 39 people in the blasts.
Prime Ministerhas called on security forces to "scrape from the sewers" those responsible. Investigators say they believe the bombers were linked to militants operating in the North Caucasus.