Three American soldiers were killed in the Shiite holy city of Karbala late Thursday night and another soldier was killed in Baghdad this morning, military officials said today. Two Iraqi security officers were also killed and five were wounded in the Karbala attack outside the headquarters of a Shiite cleric. At about 11:30 p.m. on Thursday a patrol of American military police and Iraqi security forces was ambushed near the Imam Abbas Mosque in Karbala, about 50 miles south of Baghdad. The patrol was investigating reports of armed men congregating on a road near the mosque after a 9 p.m. curfew, the United States Central Command said in a statement. Full Story