Russian Terror Attack

Suicide bombing at Russian train station triggers new Olympic security concerns.
3:00 | 12/29/13

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Transcript for Russian Terror Attack
A major terror attack in russia. And it comes just weeks now before the winter games. A surveillance camera capturing the moment a suicide bomber targets a train station, that fiery blast there and the smoke that follows. Inside, the portrait now emerging. A scene of total destruction. At least 16 lives lost. And this was the aftermath. The victims, the police tape. Russian authorities have said the winter olympics will be the safest ever. But this comes as those games now aproechlt tonight, abc's alex marquardt on the investigation and new pressure on authorities there to beef up security ahead of the games. Reporter: A massive flash followed by a cloud of smoke as the blast rips through the frigid winter air. Bodies strewn around volgograd's central train station, at least 16 dead. Ambulances race to rescue the more than 50 wounded. "There were bodies everywhere," this woman said. "Inside the train station, everything is destroyed." The suicide bomber's identity is unconfirmed. The station, one of the busiest in russia, was packed with travelers ahead of new year's. Had it not been for this police officer who stopped the bomber at the station's metal detectors, scores more could have been killed in the passenger waiting area. The bombings have raised fears for the winter olympics in sochi, which start in just six weeks. Around 250 american athletes will parpate. Sochi is 400 miles south, in the heart of the north caucuses, a region racked by terrorist attacks by islamist insurgents. In june, an islamist leader, who has claimed responsibility for past bombings, called for attacks on what he called the satanic winter games. A kremlin spokesman said new security measures are being put in place to prevent another attack. President vladimir putin has promised the safest olympics in history, but today's bombing will only underscore the potential for a deadly strike when the whole world is watching.

This transcript has been automatically generated and may not be 100% accurate.

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