President Volodymyr Zelensky said authorities recorded 400 shellings in eastern Ukraine Sunday, with the Donetsk region bearing the heaviest attacks. On Saturday, a series of powerful explosions near the Russian-occupied Zaporizhzhia nuclear power plant prompted the head of the U.N. nuclear watchdog, Rafael Grossi, to make an urgent plea to stop fighting in the region. “You’re playing with fire!” warned Grossi.