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(Reuters) - Russian prosecutors on Thursday launched their own murder investigation into the death of Alexander Litvinenko from radiation poisoning as the Russian former spy was buried at a ...

LONDON - President Vladimir Putin probably approved a 2006 Russian intelligence operation to murder ex-KGB agent Alexander Litvinenko with radioactive polonium-210 in London, a British inquiry ...

LONDON — An Italian security expert who met with former KGB agent Alexander Litvinenko the day he fell fatally ill has tested positive for the same radioactive substance found in the ex-spy's body, ...

The British government is still trying to solve the bizarre 2006 poisoning death of former KGB agent Alexander Litvinenko, who was apparently not only spying for MI6 but also for Spanish intelligence ...

Polonium 210--the substance that killed Alexander Litvinenko--has turned up in Hamburg, and Interpol and German police are on the case, with Chancellor Angela Merkel saying such killings are not "a ...

LONDON — A major diplomatic row loomed last night after Prime Minister Blair demanded the extradition from Russia of the man accused of murdering a former security service agent, Alexander Litvinenko.

LONDON -- Alexander Litvinenko couldn't have poisoned himself accidentally with radioactive polonium, and received threats for years before his death, the former Russian spy's widow said Tuesday.