The story of a Ukrainian father who survived the siege of Mariupol, only to be arrested at a Russian filtration camp and separated from his three young children, who were exiled to Russia. Ukrainecast producer Arsenii Sokolov and Nina Nazarova from the BBC’s Russian service join Vitaly to tell us more about this shocking case. The BBC’s security correspondent Frank Gardner takes listener questions about the latest on the situation in Ukraine: Russia’s claims on dirty bombs, how this conflict compares to others, among others. Today’s Ukrainecast was hosted by Vitaliy Shevchenko and Frank Gardner. The series producer is Estelle Doyle. The producers are Luke Radcliff and Arsenii Sokolov. The technical director, Michael Regaard. The senior news editor , Jonathan Aspinwall. Email Ukrainecast@bbc.co.uk with your questions and comments. You can also send us a message or voice note via WhatsApp, Signal or Telegram to +44 330 1239480