“They fear that this could allow the Russians to isolate them, cut off their supplies and then just chop away at them.
“This bridge, near Belahorivka, is one of those pontoon-type bridges, which has been built here.
“Now remember the Ukrainians have been blowing up a lot of their own bridges as they have retreated from areas.
“The Russians are a very traditional military force, they need to move big pieces of equipment, artillery, tanks, things like that.
“For that they need bridges, so the Ukrainians have managed to go after them to try and cut them off, but the Russians keep trying to rebuild them.”
Article source: https://www.express.co.uk/news/science/1616589/ukraine-esa-astronaut-war-putin-mariupol-satellite-images