Police probe substance as Russian spy 'critical' in hospital

Police probe substance as Russian spy 'critical' in hospital  BBC News Former Russian spy falls critically ill after exposure to 'unknown substance' in Britain  Chicago Tribune Former Russian spy critically ill after exposure to 'unknown substance'  CNN Former Russian spy critically ill in UK 'after exposure to substance'  The Guardian Alexander Litvinenko's widow says ex-Russian spy Sergei Skripal's mysterious critical illness is 'like deja vu'  Evening StandardFull coverage

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