A suicide bomber struck a busy railway station in southern Russia on Sunday, killing at least 15 others and wounding scores more, officials said, in a stark reminder of the threat Russia is facing as it prepares to host February's Olympics in Sochi.
No one immediately claimed responsibility for the bombing in Volgograd, but it came several months after Chechen rebel leader Doku Umarov called for new attacks against civilian targets in Russia, including the Sochi Games.
Suicide bombings have rocked Russia for years, but many have been contained to the Caucasus, the center of an insurgency seeking an Islamist state in the region. Until recently Volgograd was not a typical target, but the city formerly known as Stalingrad has now been struck twice in two months suggesting militants may be using the transportation hub as a renewed way of showing their reach outside their restive region.
Volgograd, which borders the Caucasus, is 900 kilometers (550 miles) south of Moscow and about 650 kilometers (400 miles) northeast of Sochi, a Black Sea resort flanked by the North Caucasus Mountains.
The bombing highlights the daunting security challenge Russia will face in fulfilling its pledge to make the Sochi Games the "safest Olympics in history." The government has deployed tens of thousands of soldiers, police and other security personnel to protect the games.
Through the day, officials issued conflicting statements on casualties. Officials said that the suspected bomber was a woman, but late Sunday the Interfax news agency quoted an unidentified law enforcement officer as saying footage taken by surveillance cameras indicated that the bomber was a man. There was no immediate confirmation of that claim from any official sources.
The bomber detonated explosives in front of a metal detector just beyond the station's main entrance when a police sergeant became suspicious and rushed forward to check ID, officials said. The officer was killed by the blast, and several other policemen were wounded.
"When the suicide bomber saw a policeman near a metal detector, she became nervous and set off her explosive device," Vladimir Markin, the spokesman for the nation's top investigative agency, said in a statement. He added that the bomb contained about 10 kilograms (22 pounds) of TNT and was rigged with shrapnel.
Markin said that security controls prevented a far greater number of casualties at the station, which was packed with people at a time when several trains were delayed.
Markin said 13 people and the bomber were killed on the spot, and the regional government said two other people later died at a hospital. About 40 were hospitalized, many in grave condition.
The Interfax news agency reported that the suspected bomber's head was found at the site of explosion, which would allow quick identification.
Lifenews.ru, a Russian news portal that reportedly has close links to security agencies, said the attacker appeared to have been a woman whose two successive rebel husbands had been killed by Russian security forces in the Caucasus.
AP