U.S. soldier killed in Iraq attack

BAGHDAD, Iraq (CNN) -- A U.S. soldier was killed and two were wounded when a military ambulance was hit by a rocket-propelled grenade south of Baghdad, U.S. Central Command said Thursday.

The extent of the injuries was not clear.

The soldiers from the 804th Medical Brigade were transporting a patient injured in another incident to the 28th Combat Army Support Hospital, Central Command said.

"The ambulance was clearly marked with a big red cross," Capt. John Morgan said. "No regard for human life."

The attack took place in the town of Al Iskandariyah, north of Camp Dogwood near the area where a U.S. soldier was killed and another wounded Wednesday in a drive-by attack.

More than 50 U.S. troops have died in hostile fire and accidents since President Bush declared an end to major combat in Iraq on May 1. American forces have launched a major effort to hunt down remaining pockets of resistance, a campaign dubbed Operation Desert Scorpion.

U.S. Defense Secretary Donald Rumsfeld said Wednesday that attacks on U.S. troops by Iraqi "dead-enders" will continue for some time but said he saw no sign of a central or regional organization behind them.

Earlier Thursday, U.S. Central Command announced that one Iraqi was killed and 12 were wounded in a mortar attack on a coalition building north of Baghdad. No U.S. troops were injured in the attack.

Soldiers from the 4th Infantry Division, stationed at the civil military operations center in Samarra, reported hearing three explosions, according to a Central Command statement Thursday. Samarra is about 75 miles (121 kilometers) north of Baghdad.

"This is one of numerous incidents recently where Iraqi resistors have attacked coalition forces or coalition provisional authority locations and injured or killed Iraqi citizens," the Central Command statement said