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Putin has called the explosions inhumane attacks and warned that terrorists will face total destruction. More than 30 people were killed in two bomb blasts in Volgo-grad on Sunday and Monday. The first explosion rocked the city\\\'s railway station, with the other one ripping through a bus. No one or group has yet claimed responsibility for the attacks. Security has been tightened at railway stations and airports across Russia. Police have started sweeps throughout Volgograd, detaining dozens of people. The bombings have raised fears of more attacks as Russia is set to host Winter Olympics in February.