Bombs attack kills 12 in Russia

Two bombs are exploded at Russia's southern republic of Dagestan on Wednesday, officials said. In this blast kills 12 people, 9 of them were police officers.

Another 23 people, including 11 police officers, were hospitalized with injuries from the bombings, minimum of 1 which was carried out by a suicide bomber, according to a spokesperson.

Two days before the female bombers kill minimum of 39 people on the Moscow metro. It is also carried out by the same terrorist group. Russian investigators have believed Chechen rebels may have been behind Monday's fatal bombings in Moscow, although no one has claimed responsibility.