Kremlin critic Alexei Navalny told Russia on Monday to hand over the clothes he was wearing when he fell into a coma last month and accused Moscow of withholding an important piece of evidence in his case. The outspoken opponent of President Vladimir Putin said his clothes were taken away from him before he was flown to Germany for treatment from Siberia after he became violently ill on a domestic flight. Berlin says tests in Germany, France and Sweden have determined he was poisoned with a Novichok nerve agent and the West has demanded an explanation from Russia.