Deadly attacks in Russia 's Volgograd put spotlight on security during Sochi Olympics . The city of Volgograd is the site of a deadly attack last month that killed at least 39 people and injured more than 100 others. Umarov took credit for the bombing of a Moscow to St. Petersburg train in November 2009 in which 27 persons were killed , two suicide attacks in March , 2010 on the Moscow metro in which 40 persons were killed and the suicide bombing in January 2011 of the Domodedovo Airport in which 36 persons were killed and 160 injured . Many of the expected visitors do not realize that they are walking into a `` war zone '' The inability of the authorities to prevent attacks was on display in Volgograd , he says .
Deadly attacks in Russia 's Volgograd put spotlight on security during Sochi Olympics . The city of Volgograd is the site of a deadly attack last month that killed at least 39 people and injured more than 100 others. Many of the expected visitors do not realize that they are walking into a `` war zone '' The inability of the authorities to prevent attacks was on display in Volgograd , he says .