U.S. first lady Jill Biden paid a surprise visit to Ukraine and held a Mother’s Day meeting with her Ukrainian counterpart, Olena Zelenskyy.

Her visit also comes as dozens are feared dead after reports that a school in the Luhansk region in eastern Ukraine has been hit by Russian shelling. According to CNBC, Luhansk is one of the two regions that make up the Donbas, where Russian troops are now concentrating their efforts.

Biden’s visit comes after recent trips to the country by House Speaker Nancy Pelosi, as well as U.S. Secretary of State Antony Blinken and Defense Secretary Lloyd Austin.

Meanwhile, the last women, children and elderly people have been evacuated from the Azovstal steel plant, the final holdout for Ukrainians in the besieged port city of Mariupol, according to Ukraine’s deputy prime minister.

More than 170 Ukrainian civilians who were evacuated from the Azovstal steel plant and other areas around the besieged port city of Mariupol have arrived in Ukraine-controlled Zaporizhzhia, in the southeastern part of the country.