We’ve been covering what is happening at the Azovstal steel works in Mariupol, hundreds of civilians and injured soldiers stuck.

Talking prior to Portuguese media, UN Secretary General Antonio Guterres said work was forging ahead with an arrangement to clear many regular citizens from the steel plant.

“This is a very complicated operation,” said Guterres, who has this evening arrived in Ukraine after meeting Vladimir Putin in Moscow yesterday. “Putin agreed in principle and it was agreed that the details would be discussed in the meetings that are currently taking place,” he said.

“This operation is particularly delicate, because we are not dealing with people who are in their homes, or in public places to be evacuated, but people who are, let’s say, inside a bunker in truly dramatic conditions,” he said. “Our aim was to do this operation on Friday but naturally, the conditions must be in place for us to do that.”