Russia is preparing for the next stage of its offensive in Ukraine, a Ukrainian military official said, after Moscow said its forces would step up military operations in "all operational areas".
Meanwhile, Ukrainian President Volodymyr Zelenskyy fired the head of Ukraine's powerful domestic security agency, Ivan Bakanov, and Prosecutor General Iryna Venediktova, who led the effort to prosecute Russian war crimes, saying many of their employees were collaborating with Russia.