The explosion in the city of Volgograd has also injured dozens more. Officals say the bomber detonated her explosives at the entrance of the station which was packed with afternoon travellers. There\\\'s no immediate claim of responsibility. This comes ahead of the Sochi Winter Games which is to be held in February. Back in October, seven people were killed in an attack by a female bomber in the same city. Volgograd is located in the volatile North Caucasus region. Show Less >>