Suicide Bomber behind Trolleybus Deadly Blast in Volgograd - OfficialsWorld | December 30, 2013, Monday // 08:39| views
Video footage from the scene Monday showed the twisted shell of the blue trolleybus, with debris spread around it.
A suicide bomber has set off the deadly trolleybus explosion, which killed at least 10, in the Russian city of Volgograd on Monday morning, officials say.
The blast comes a day after 17 people died in a suicide bombing at the central station in the city.
Security has been tightened at railway stations and airports across Russia.
Moscow is concerned militant groups could be ramping up violence in the run-up to the 2014 winter Olympic Games in the city of Sochi.
The Olympic venue is close to Russia's volatile north Caucasus region.
Volgograd lies about 900km (560 miles) south of Moscow, 650km north of the North Caucasus and 700km north-east of Sochi.
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