Russia's Prigozhin says Bakhmut territories captured as promised, will leave zone

May 21 (Reuters) - The head of Russia's Wagner mercenary group said on Sunday that his forces had captured all the territory in the eastern Ukrainian city of Bakhmut as promised and would leave the conflict zone later this week. "Wagner has made no advances. Wagner today captured no territory. We have captured all the territory we promised to capture, right up to the last centimetre," Yevgeny Prigozhin said in an audio message posted on Telegram messaging app. "As we stated yesterday. We are handing over our positions to (Russia's)...