At least 25 people are reported to have been killed in an explosion on the Metro system in central Moscow, with a second blast coming shortly afterwards. The first blast happened at the city's central Lubyanka station, reports quoting security sources said. A second explosion happened at the Park Kultury station, Russian news agency Tass reported. Ten people were injured in the first blast, Tass said, quoting the emergencies ministry. The number of casualties at the second blast is not yet clear.
