There is ‘unequivocal proof’ that the Russian opposition politician Alexei Navalny was poisoned with a Novichok nerve agent. That’s the finding of the German government, which says Mr Navalny was the victim of attempted murder and the world was looking to Russia for answers. Mr Navalny was airlifted to Berlin in a coma after falling ill on a flight last month. His team says he was poisoned on the orders of President Putin, but the Kremlin denies the allegation. Novichok was used to poison the former Russian spy Sergei Skripal and his daughter in the UK in 2018. Our security correspondent Gordon Corera reports.
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