Four Iraqis -- an interpreter and three civilians -- also were reported killed in that attack.
At least 3,545 U.S. troops have been killed in Iraq since the March 2003 invasion.
In other violence, police say a suicide truck bomber killed at least 16 people when he rammed his vehicle into the municipal headquarters of a northern Iraqi town on June 21.
The attack occurred in Sulaiman Pek, a town 90 kilometers south of Kirkuk.
Police say the dead included women and children.
Copyright (c) 2006. RFE/RL, Inc. Reprinted with the permission of Radio Free Europe/Radio Liberty, 1201 Connecticut Ave., N.W. Washington DC 20036. www.rferl.org
