Fighting in recent weeks at Donetsk airport and in Debaltseve has killed 5,809 , UN says . Civilians who have n't left often do n't for fear of being killed , if they try to move .
Fighting in recent weeks at Donetsk airport and in Debaltseve has killed hundreds , UN says . Civilians who have n't left often do n't for fear of being killed , if they try to move .