U.S. forces fought for hours yesterday with supporters of Shiite cleric Muqtada al Sadr. Members of Sadr’s milita told the Knight Ridder news agency that US troops surrounded the home of Sadr’s late father in Najaf in an apparent attempt to arrest him. A firefight broke out that lasted several hours — at least one Iraqi was killed. US officials denied the account saying that their soldiers had came under attack. On Saturday US soldiers arrested the head of Sadr’s office in Karbula.