Satellite photos analyzed by The Associated Press show Russian fire is intensifying on a steel mill that is the last Ukrainian-held area in the city of Mariupol.
The images by Planet Labs PBC shot Wednesday show that concentrated attacks have greatly damaged a central facility at the Azovstal steelworks.
An estimated 1,000 civilians are sheltering along with about 2,000 Ukrainian fighters in the steelworks, a massive Soviet-era complex with a warren of underground facilities built to withstand airstrikes.
Mariupol, a strategic port city on the Sea of Azov, is viewed as crucial for the Russians in the war.
The new images come as U.N. Secretary-General Antonio Guterres visits Ukraine and plans to speak to Ukraine’s president about his efforts to negotiate with Moscow for a corridor for people to leave the besieged area.
