▁times ▁the ▁number ▁of ▁Ira q is ▁killed ▁by ▁terror ist ▁bomb ings ▁during ▁March ▁ 2 0 0 6 ▁were ▁killed ▁by ▁sect arian ▁death ▁squad s ▁during ▁the ▁same ▁period . ▁A ▁total ▁of ▁ 1 , 3 1 3 ▁were ▁killed ▁by ▁sect arian ▁milit ias ▁while ▁ 1 7 3 ▁were ▁killed ▁by ▁suic ide ▁bomb ings . ▁The ▁LA ▁Times ▁later ▁reported ▁that ▁about ▁ 3 , 8 0 0 ▁Ira q is ▁were ▁killed ▁by ▁sect arian ▁violence ▁in ▁Bag hd ad ▁alone ▁during ▁the ▁first ▁three ▁months ▁of ▁ 2 0 0 6 . ▁ ▁During ▁April ▁ 2 0 0 6 , ▁m org ue ▁numbers ▁show ▁that ▁ 1 , 0 9 1 ▁Bag hd ad ▁residents ▁were ▁killed ▁by ▁sect arian ▁execution s . ▁ ▁In sur gen cies , ▁frequent ▁terror ist ▁attacks ▁and ▁sect arian ▁violence ▁in ▁Ira q ▁lead ▁to ▁har sh ▁criticism ▁of ▁US ▁policy ▁and ▁fear s ▁of ▁a ▁failing ▁state ▁and ▁civil ▁war . ▁The ▁concerns ▁were ▁expressed ▁by ▁several ▁US ▁think ▁t anks ▁as ▁well ▁as ▁the ▁US ▁amb assador ▁to ▁Ira q , ▁Z al may ▁K hal il z ad . ▁ ▁In ▁early ▁ 2 0 0 6 , ▁a ▁hand ful ▁of ▁high - ran king ▁retired ▁gener als ▁began ▁to ▁demand ▁Secretary ▁of ▁Def ense ▁Rum sf eld ' s ▁res ignation ▁due ▁in ▁part ▁to ▁the ▁a for ement ioned ▁cha os ▁that ▁apparently ▁resulted ▁from ▁his ▁management ▁of ▁the