美国有线新闻 CNN 俄罗斯圣彼得堡地铁发生爆炸 俄官方定性为恐怖袭击（在线收听）

An explosion took place between two subway stations in St. Petersburg, Russia, yesterday and officials say it was a terrorist attack.

This happened just after 2:30 p.m. in Russia's second largest city. Russian officials say one explosive device went off on a moving subway train. It killed at least 10 people and wounded dozens of others. A second device was reportedly found and defused at another station.

St. Petersburg's entire train system, which carries more than 2 million people a day, was shut down. And a time we produce this show, no group had claimed responsibility for the attack.

The conductor of the damaged train might have saved lives. Russian investigators say he kept the train moving after the explosion rather than stopping in the tunnel. Because he made it to the next station, surviving passengers were able to get out and rescuers were able to help the injured.

Russian President Vladimir Putin was in St. Petersburg at the time, speaking at a media event. A Russian official suggested the location and timing of the blast might have been intended to coincide with Putin's visit.

Several terrorist attacks were carried in Russia earlier this century, but the nation has had relatively few in recent years.

CNN