Russian forces on Saturday resumed attacks on a steel plant sheltering an estimated 1,000 citizens and the last remaining Ukrainian fighters in Mariupol, Ukrainian officials said. The move marks an apparent departure from Russian President Vladimir Putin’s order earlier in the week not to attack the Ukrainian holdout in the strategic port city, but to instead block off the facility from supplies to force the Ukrainians to surrender. Oleksiy Arestovich, an advisor to Ukrainian President Volodymyr Zelenskyy, said in a briefing that Russian forces had targeted the Azovstal steel plant in air strikes and were attempting to storm it. On...