In news from Iraq, the McClatchy Newspapers report a U.S. military convoy opened fire on a column of cars Sunday morning, killing at least two Iraqi civilians in southern Iraq and igniting a new round of anger over the apparent loss of innocent life. Iraqi police charged that the shootings were unprovoked and said six people, including two Iraqi policemen, died in a barrage of bullets. The incident occurred on a day when U.S. officials announced that attacks in Iraq were at their lowest levels in nearly two years.