Tests show Kremlin critic and Russian opposition leader Alexei Navalny was poisoned, according to doctors at the German hospital where he is being treated.

Navalny, a well-known detractor of Russian President Vladimir Putin, arrived in Berlin on Saturday. He remains in an artificial coma in the intensive care unit even though “there is no acute danger to his life,” according to a statement from Berlin’s Charite Hospital on Monday.

Recommended Stories

‘Putin is a thief’: Hundreds arrested across Russia during mass anti-corruption protests

Nord Stream 2 emboldens Putin’s human rights abuses

Navalny’s wife demands punishment for ‘Putin and all his staff’ following reports of husband’s death