The last working reactor at Ukraine's Zaporizhzhia nuclear plant was disconnected from the grid after shelling caused a fire, with the UN's atomic watchdog due to brief the Security Council about the crisis on Tuesday.
Soon after it invaded in February, Moscow largely took control of the Kherson and Zaporizhzhia regions of southern Ukraine and is now aiming to absorb them into Russia through referendums -- as it did with Crimea in 2014.