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Suicide bombings in Volgograd

Associated Press
An ambulance leaves the site of a trolleybus explosion in Volgograd, Russia, Monday, Dec. 30, 2013. The explosion left 10 people dead Monday, a day after a suicide bombing that killed at least 17 at the city's main railway. The explosions put the city on edge and highlighted the terrorist threat that Russia is facing as it prepares to host the Winter Games in February. Volgograd is about 650 kilometers (400 miles) northeast of Sochi, where the Olympics are to be held. (AP Photo/Denis Tyrin)

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Police detained dozens of people on Tuesday in sweeps through the Russian city of Volgograd after two deadly attacks in less than 24 hours that raised security fears ahead of the Winter Olympics.

A man wounded when a bomber set off a blast in the city's railway station on Sunday died overnight, bringing the toll in that attack to 18. Regional governor Sergei Bazhenov said 16 died in a trolleybus bombing on Monday. (Reuters)

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