-- AP: Dmitry Kovtun, associate of poisoned Russian ex-spy Alexander Litvinenko, is in a coma,

Spy contact's condition 'critical'

An associate of poisoned Russian ex-spy Alexander Litvinenko, is in a critical condition in hospital after showing signs of radiation sickness, Russian media reports say.

Dmitry Kovtun, a businessman and former Russian agent who met Litvinenko on the day he fell ill, had fallen into a coma, Interfax news agency said, according to The Associated Press.

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