Gunmen fired on a minibus in Baghdad on Sunday, killing two Iraqi women who were working for the U.S.-led occupation. In southern Iraq, armed assailants killed a translator for the occupation and critically wounded another in attacks on their houses, police and witnesses said. The attackers who fired on the bus in Baghdad also detonated explosives in it, killing the driver and wounding another woman. Lt. Ali Omran of al-Dora police station said the attacked women were working for the Americans. Meanwhile, clashes broke out Sunday in the southern city of Nasiriyah between Muqtada al-Sadr's forces and Italian troops at a bridge across the Euphrates river, residents and Italian media said. Two al-Sadr supporters were killed Sunday, according to local resident, Ghaith Majeed. Earlier, most civilian staffers of the occupation were evacuated from their headquarters because of growing threats from fighters of al-Sadr. An occupation official, Andrea Angeli, said Sunday that only two civilians remained in the headquarters, which was attacked Friday by al-Sadr forces who were pushed back by Italian troops, The AP reported. Early Sunday, a female Iraqi translator working with U.S. troops was killed and another was critically injured when gunmen broke into their houses in Mahmoudiyah, said Dawood al-Taee, director of the city's hospital. Al-Sadr's fighters opened fire Saturday night on U.S. soldiers at a police station in Sadr City, a Baghdad neighborhood that is one of the cleric's strongholds. Two Iraqis were killed in the skirmish, witnesses said. Gunfire damaged one of shrines in Najaf in fighting on Friday, prompting calls for revenge and even bomb attacks against the occupation. On Sunday, Iran's supreme leader accused the United States of damaging the shrine and called U.S. actions "shameless" and "foolish." He stressed that Iraqis and Muslims will not remain silent in the face of such aggression. "Muslims can't tolerate the shameless incursion of American forces into sacred places," Ayatollah Ali Khamenei was quoted as saying by the official Republic News Agency. **PHOTO CAPTION*** Iraqi youths throw stones at a U.S. military convoy in the center of the Al-Sadr city in Baghdad, May 15, 2004. (Reuters)