Investigators were trying to establish how the bombers again slipped a security dragnet in the heart of the capital that makes extensive use of explosive detection wands at numerous checkpoints.

• 调查人员正在努力确认，爆炸人员是如何在伊拉克首都的市中心再次躲过安检网的，此地的大量检查点都布有爆炸物探测棒。