Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Russia Mourns Moscow Terror Victims VOA News 30 March 2010 A woman grieves near the flower tributes placed in memory of the subway blasts' victims at the Park Kultury subway station Photo: AP A woman grieves near the flower tributes placed in memory of the subway blasts' victims at the Park Kultury (Park of Culture) subway station, which was earlier hit by an explosion, 29 Mar 2010 Russia is holding an official day of mourning for the 39 people killed in Monday's twin suicide bombings on Moscow's metro system. Scores of others were severely wounded when two female suicide bombers set off explosions at the height of the morning rush hour. National flags will be flying half-staff in the Russian capital on Tuesday. Television shows and other forms of entertainment have also been canceled. Russian President Dimtri Medvedev visited the Lubyanka station Monday, where the first explosion took place, and laid flowers on the platform. He referred to those responsible as "beasts" who will be destroyed. Prime Minister Vladimir Putin, who cut short a visit to Siberia to return to Moscow, said everything will be done to find and punish "the criminals." There has been no claim of responsibility. But Russian authorities blamed Muslim militants from the Northern Caucasus region, which includes Chechnya. U.S. President Barack Obama, in a telephone call, told Mr. Medvedev that the United States is "ready to cooperate with Russia to bring to justice those who undertook this attack." Statements of outrage and condolences have poured in to Moscow from world leaders. German Chancellor Angela Merkel expressed her "shock and horror" over the bombings -- while French President Nicolas Sarkozy likened them to the September 11, 2001, attacks on the United States.  U.N. Secretary-General Ban Ki-moon said he is confident Russian authorities will bring to justice the perpetrators of what he decried as "this heinous terrorist attack." Monday's bombings are the first in the Russian capital in six years. Last month Doku Umarov, a top Chechen rebel leader, vowed to take the battle for Chechyna's independence to Russia's cities. Some information for this report was provided by AP. .