NEW : The media say most people evacuated Sunday after 83 moved Friday . Each side says other was responsible for gunfire aimed at U.N.-led aid convoy . Valerie Amos , the U.N. humanitarian chief , lamented Saturday that the `` three-day humanitarian pause agreed ( upon ) was broken today and aid workers ( were ) deliberately targeted . '' Fighting began on Friday , part of a three - day humanitarian crisis . More than 2,500 have been trapped by months of violence .
NEW : The media say most people evacuated Sunday after 83 moved Friday . Each side says other was responsible for gunfire aimed at U.N.-led aid convoy . Fighting began on Friday , part of a three - day humanitarian crisis . More than 2,500 have been trapped by months of violence .