A suicide attack on Moscow’s Domodedovo international airport killed more than 30 people and injured scores on Monday, officials said.
Eyewitnesses told the Vesti 24 TV channel that two terrorists blew themselves up as passengers emerged from the international arrivals zone at 4:40 p.m. (13:40 GMT).
The Health Ministry said 31 people died and dozens were injured in the attack, the second terrorist assault on the Russian capital in less than 12 months.
Law enforcement officials said the power of one of the blasts was equal to 5 kg of TNT and that the bomb was packed with metal objects to cause maximum damage.
Airport employees broke down the wall between the main airport and the arrivals zone to allow passengers to escape the scene of destruction.
Prime Minister Vladimir Putin has been informed about the blast. President Dmitry Medvedev pledged assistance to the families of the dead and those injured in the attack. He also announced he would postpone his visit to the Davos Economic forum in Switzerland.
Russia’s Rosbalt news agency said the Federal Security Services (FSB) were aware that terrorists were planning an impending attack, but were searching for the terrorists in Moscow's administrative district of Zelenograd.
Security has been tightened at other airports in the capital and the city’s metro system, which was hit by deadly terrorist attacks in March 2010.
Two planes which took off from the airport, Moscow’s busiest, were blown up by female Chechen suicide bombers in August 2004.
An attack on a high-speed luxury train between Moscow and St Petersburg killed 27 people in November 2009.