Moscow yesterday hit back at Western countries for sanctioning senior Russian officials over the poisoning of Kremlin critic Alexei Navalny, warning its foes "not to play with fire". The Kremlin accused Washington and Brussels of interference after the US and the EU introduced fresh penalties Tuesday over Navalny, who was jailed last month when he returned from Germany where he was recovering from exposure to a nerve agent. The sanctions announced Tuesday by Washington signal a harder line from President Joe Biden and target several individuals within Russia's security sector, including Federal Security Service (FSB) head Alexander Bortnikov. But Peskov on Wednesday again denied Russian involvement and said that claims the FSB was involved in a poisoning attack were "outrageous".