evidence that could add up to war crimes. jeremy bowen, bbc news, outside kyiv. a convoy of buses carrying residents of the besieged southern ukrainian city of mariupol has reached the relative safety of the nearby city of zaporyzhzhia. the convoy travelled from the occupied port of berdyansk with about two thousand people, who had managed to make their own way out of mariupol. however, a red cross efforts to bring in aid and evacuate residents from the shelling in mariupol were frustrated for a second day in a row. with me is our news reporter azadeh moshiri. what we know about the operation? in general the worse