BAGHDAD, Iraq (AP) - In perhaps the boldest and most sophisticated attack in four years of warfare, gunmen speaking English, wearing U.S. military uniforms and carrying American weapons abducted four U.S. soldiers last week at the provincial headquarters in the Shiite holy city of Karbala and then shot them to death.

The U.S. military confirmed a report earlier Friday by The Associated Press that three of the soldiers were dead and one was mortally wounded with a gunshot to the head when they were found in a neighboring province, about 25 miles from the compound where they were captured. A fifth soldier was killed in the initial attack on the compound.

The new account contradicted a U.S. military statement on Jan. 20, the day of the raid on an Iraqi governor