World Putin critic Alexei Navalny detained upon return to Moscow after poisoning allegedly linked to Kremlin January 17, 2021January 17, 2021Mstyslav Chernov, USA TODAYComments Off on Putin critic Alexei Navalny detained upon return to Moscow after poisoning allegedly linked to Kremlin Navalny, who is Putin's most prominent foe, was returning from Germany, where he spent months recovering from a poisoning he blames on the Kremlin.