Tests carried out on Russian opposition leader Alexei Navalny provide clear proof that he was poisoned by a chemical nerve agent, the German government said Wednesday, demanding explanations from Moscow.

“It is a shocking event that Alexei Navalny has become the victim of an attack with a chemical nerve agent in Russia,” said government spokesman Steffen Seibert in a statement.

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Tests carried out by the German army in consultation with the Charite hospital in Berlin, where Navalny is being treated, had found evidence of the agent – Novichok – he said.

Following the announcement, Berlin released a statement saying it demanded “urgent clarification” from Moscow over the Russian opposition leader’s alleged poisoning.

Read more at i24NEWS.