People gather outside Sennaya Ploshchad metro station after explosion tore through train carriage in St. Petersburg metro system, in St. Petersburg (Photo:Reuters)
A spokesman for Russia's top anti-terror agency says law enforcement agents have found and defused another explosive device on St. Petersburg's subway.
Andrei Przhezdomsky (pr-ZHEZ-domsky) said the improvised explosive was found Monday on Ploshchad Vosstaniya station. He made the statement about two hours after a blast on a subway train in St. Petersburg killed at least 10 and wounded dozens of others.
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