IVAN LYUBYSH-KIRDEY UKRAINIAN police staged a risky rescue mission in the besieged eastern city of Bakhmut this week to evacuate a six-year-old girl who had become separated from her pregnant mother. Young Arina was found living with her grandparents in a run-down apartment building in Bakhmut, which has been pummelled by Russian forces in heavy fighting. After trudging through the snow to reach Arina, with artillery fire echoing in the distance, policeman Pavlo Dyachenko and two colleagues in combat gear drove Arina to the nearby city of Sloviansk to be reunited with her mother, Halyna Danylchenko. "A shell exploded in our…