IAEA Director General Rafael Mariano Grossi speaks at a press conference about the situation at the Zaporizhzhia Nuclear Power Plant in Ukraine in Vienna, Austria, on Friday, March 4, 2022.AP Photo/Lisa Leutner The International Atomic Energy Agency on Sunday said it's concerned about nuclear safety in Ukraine. In a statement, the IAEA said the Zaporizhzhia nuclear plant is now under Russian command.