Moscow - A security clamp down is ordered across Russia after the weekend terror attacks in Volgograd. The Russian interior ministry is ordering tightened security throughout the country. President Vladimir Putin and Prime Minister Dmitriy Medvedev are meeting at the Kremlin. The bombings are throwing a harsh glare on the severe terror threat Russia is facing when it hosts the 2014 winter Olympics in the city of Sochi in February. More than thirty people were killed in a pair of bombings, one striking a rail station Sunday, the other blowing up a trolley bus on Monday. Investigators say the bombs were similar and that the same group was behind both attacks. No one has claimed responsibility for the attacks.