Russian forces shelled the Azovstal steel plant soon after some civilians were evacuated from the besieged facility, Ukrainian military officials said ahead of fresh evacuations planned for Ukraine's final stronghold in Mariupol on Monday.

Details: Ukraine National Guard brigade commander Denys Shlega said in a TV address Sunday night that "as soon as the last civilian" from the group of evacuees left the plant it "came under fire again" as several hundred remaining civilians were sheltering, including up to 20 children, per Ukrainian news agency Ukrinform.

Ukrainian President Volodymyr Zelensky said about 100 civilians were evacuated from the plant on Sunday.

Those evacuees were expected to arrive in the city of Zaporizhzhia on Monday, according to Zelensky.

The big picture: A Doctors Without Borders team was waiting for the displaced Mariupol residents in Zaporizhzhia on Monday, with officials concerned that the evacuees may have been left weak after being trapped underground for so long and with food supplies low, per AP.