Poisoning of Alexander Litvinenko
Alexander Litvinenko: The story behind the murder - BBC News
Spy blamed Putin for poisoning on deathbed
Russian Ex-spy poisoned: Widow of Alexander Litvinenko speaks to FRANCE24
Who killed Alexander Litvinenko?
Alexander Litvinenko probably poisoned on FSB's orders, says Sir Robert Owen
Alexander Litvinenko was a former officer of the Russian Federal Security Service (FSB) and KGB, who fled from court prosecution in Russia and received political asylum in the United Kingdom.
Illness and poisoning
Death and last statement
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References in popular culture