The U.S. military on Sunday confirmed that an Iraqi interpreter was killed along with four U.S. soldiers in an attack south of Baghdad, leaving three American soldiers missing. Maj. Gen. William Caldwell, the chief U.S. military spokesman in Iraq, said about 4,000 American forces were involved in the search for the three missing troops in the notorious «triangle of death» south of the capital. He said the bodies of the three slain soldiers and the Iraqi interpreter had been identified, but the military was still working to identify the fifth, the Associated press reported.