Due to their size, shape and physical state, it is likely that the fragments originated from the explosives container (i.e., the Mitsubishi truck) or a metallic object in the close vicinity of the IED.
从其大小、形状和实际情况来看，这些碎片可能来自装载爆炸装置的物体（即三菱卡车）或爆炸装置近旁的一个金属物。