Only two of the 39 people who died in Monday morning's blasts in the Moscow metro system have yet to be identified, Russia's emergencies ministry said on Tuesday.

According to the ministry, the youngest victim of the first terrorist attack in the Russian capital since 2004 was 17-year-old Tatiana Akimova. The oldest was 64-year-old Irina Makarova.

All but three of the people who died in the blast were Russian nationals. Two Tajik nationals and a Ukrainian man were also killed.

Moscow observed a day of mourning on Tuesday as Prime Minister Vladimir Putin vowed those behind the attack would be dragged "out of the sewers into the light of God."

The Federal Security Service (FSB) has said female suicide bombers were responsible for both blasts, which hit the central Lubyanka and Park Kultury stations during rush hour.

The explosions came four months after a terrorist bomb derailed a Moscow-St. Petersburg train, killing 27.

Russia has been fighting militants in the North Caucasus for almost two decades, including two brutal separatist wars in Chechnya. Analysts suggested that Monday's attacks were revenge for a recent operation in Chechnya that saw the deaths of over 20 radical Islamic fighters.

MOSCOW, March 30 (RIA Novosti)