Navalny's blood contained 'the presence of nerve agent' - sources
A diplomatic source and a source at the OPCW said the tests showed a nerve agent was found in his blood
Blood samples taken from Kremlin critic Alexei Navalny and examined by the world's chemical weapons agency "confirm the presence of a nerve agent" in the Novichok family, sources said on Tuesday.
The Organisation for the Prohibition of Chemical Weapons (OPCW) was due to release the results of testing later.
A diplomatic source and a source at the OPCW said the tests showed a nerve agent was found in his blood.