Polonium export controls 'tough', says Russia nuclear chief

Russia’s top nuclear official said today that his country tightly controls all exports of polonium, the radioactive isotope that British authorities suspect killed former KGB agent Alexander Litvinenko in London.

Rosatom director Sergei Kiriyenko also ruled out that the polonium found in Britain and linked to Litvinenko’s mysterious death last week could have been stolen from a production facility in Russia.