Ukraine said on Friday Russia was bringing Wagner mercenary fighters from other parts of the front line to fight in Bakhmut in eastern Ukraine, and that Moscow wanted to capture the city in time for Victory Day celebrations next week.
Wagner Group leader Yevgeny Prigozhin said his mercenary forces would pull out of Bakhmut on May 10 because of heavy losses and inadequate ammunition supplies.
That is one day after Russia celebrates the Soviet victory over Nazi Germany in World War Two, an important day in the Russian calendar.