IAEA Director General Rafael Grossi, who is leading an inspection of the frequently-shelled Russian-held Zaporizhzhia nuclear plant in southern Ukraine, said that some of the 14-member mission will stay at the facility "until Sunday or Monday," without specifying an exact number.

"There is a group that is going to be there (at the plant) until Sunday or Monday, continuing with the assessment," Grossi told reporters on Thursday, after he returned with part of his team to the Ukrainian-controlled area.