The displaced mayor of the captured Ukrainian city of Mariupol has accused Russia of holding the remaining citizens hostage. Vadym Boichenko said there are still about 100,000 residents in the city who are unable to flee to safe Ukrainian territory. He believes Russia is keeping them there to make it more difficult for Ukraine to mount a counter-offensive. “They are being held there by Russian troops and practically used as human shields,” he said in Kiev. Ukrainian President Volodymyr Zelensky has said that Kiev is waiting for further weapons to be delivered from the West before trying to lib…