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(FILES) A file picture taken 14 September 2004 shows Russian ex-spy and fierce Kremlin critic Alexander Litvinenko, after a press conference in London. The British government has evidence that the Russian state was involved in the radioactive poisoning of Litvinenko, a hearing into his death was told yesterday. A hearing ahead of a full inquest that is due to take place next year was also told that Litvinenko had been working with the Spanish secret service as well as with British intelligence AFP PHOTO/ Martyn HAYHOW (Photo credit should read MARTIN HAYHOW/AFP/Getty Images)
(FILES) A file picture taken 14 September 2004 shows Russian ex-spy and fierce Kremlin critic Alexander Litvinenko, after a press conference in London. The British government has evidence that the Russian state was involved in the radioactive poisoning of Litvinenko, a hearing into his death was told yesterday. A hearing ahead of a full inquest that is due to take place next year was also told that Litvinenko had been working with the Spanish secret service as well as with British intelligence AFP PHOTO/ Martyn HAYHOW (Photo credit should read MARTIN HAYHOW/AFP/Getty Images)

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    UK inquiry into former KGB spy's death opens

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UK inquiry into former KGB spy's death opens

A public inquiry into former KGB agent Alexander Litvinenko's poisoning death opens in London. CNN's Matthew Chance reports.

UK inquiry into former KGB spy's death opens

A public inquiry into former KGB agent Alexander Litvinenko's poisoning death opens in London. CNN's Matthew Chance reports.