"U.S.-led forces said Friday's predawn raid in the Shula district, controlled by cleric Muqtada Sadr's Mahdi Army militia, was in response to an attack on a U.S. patrol in the area. But residents said the U.S. helicopter attack caught many people asleep on their roofs, where they go to escape the stifling heat of apartments that get only an hour or two of electricity each day. Hospital officials reported that two female bodies were among those brought to two local morgues, and a Sadr spokesman said four women had been killed. Angry relatives and neighbors vowed revenge as they carried the victims' coffins through the streets."