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MOSCOW, April 3 (Reuters) - Ten people have been killed in the explosions that hit St Petersburg's metro system on Monday, a source in Russia's emergency services told Reuters.
There were blasts in two train carriages at two metro stations, St Petersburg emergency services said.
News agency Interfax cited a source as saying at least one of the blasts involved a device filled with shrapnel. The agency also said that 20 people had been injured.
Reporting by Polina Nikolskaya and Alexander Winning; writing by Sujata Rao