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.