Suspected suicide bomber kills 17 in RussiaUpdated: 2013-12-30 PM 2:31:05 (KST)
Security has been stepped up at train stations and airports around Russia after a suspected female suicide bomber attacked Volgograd train station Sunday, killing at least 17 people and injuring scores more.
Russian investigators say the bomber detonated explosives in front of a metal detector just inside the main entrance of the station that was bustling with holiday travelers.
"According to our information, a female suicide bomber approached the metal detector, saw policeman there, got nervous and detonated the bomb. It could've been worse if the bomber passed through into the waiting hall, as the explosion was the equivalent of 10 kilograms of TNT."
This is the second such attack in the same city in recent months following a bus bombing in October that killed eight including the Islamist attacker.
While the bomber's identity has still to be confirmed, and more than one person could have been involved. female suicide bombers known as "black widows" - the family members of dead insurgents - have carried out a number of attacks in nearby Muslim regions conflicting with the Russian administration.
Volgograd is only a few hundred kilometers northeast of Sochi -- raising security concerns ahead of the Winter Olympics, which kick off in February.
Song Ji-sun, Arirang News.
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