Investigators are searching through the remains of two news helicopters that crashed in Phoenix killing four people. Witnesses say neither aircraft appeared to be in distress before they collided.

• 调查人员正对在菲尼克斯坠毁的两架新闻直升机的残骸进行搜索,四人在这次事件中死亡,据目击者报道,在这两架直升机碰撞之前并没发现它们有什么不良的状况。