Bomb rigged on car kills top police official

BAGHDAD, Iraq (CNN) -- A bomb planted on a car carrying an Interior Ministry official exploded Sunday, killing the official and wounding two police officers who were accompanying him, a ministry official said.

Lt. Col. Mohammed Ibrahim worked in National Police Affairs, the official said.

The Associated Press said that Ibrahim was director of Iraq's police commandos, an elite special forces unit. The men accompanying Ibrahim were serving as his bodyguard and driver, the news agency reported.

Ibrahim was en route to work when the bomb detonated in the capital's Mansour neighborhood, according to AP.

Also Sunday, the U.S. military confirmed that two teenagers and two young men had been killed after their bodies were discovered in a house in Baquba.

All four were members of Concerned Local Citizens, a network of neighborhood watch groups that patrol residential communities and report suspicious activities to Iraqi and coalition forces. They were 17, 18, 20 and 21 years old, Staff Sgt. Sam Smith said.

No group has taken responsibility for the shooting.

In other violence:

• A U.S. soldier died when his vehicle was hit Thursday by a rocket-propelled grenade on the east side of Baghdad, the U.S. command in Iraq reported. His death brings the number of Americans who have died in Iraq since the nearly 5-year-old war began to 3,945, including 40 in January. Seven civilian contractors also have been killed.

• A U.S. soldier died in northern Iraq's Nineveh province Saturday, the U.S. military said. The military said only that the soldier did not die in combat. No other details were released.

• A mortar landed on an Iraqi army patrol in the Seleikh neighborhood of northern Baghdad on Sunday, killing one soldier and wounding three civilians, an Interior Ministry official said.

• In Mosul, a roadside bomb targeting a U.S. military vehicle wounded two Iraqis and damaged the main gun of a U.S. Abrams tank, Smith said. No U.S. soldiers were injured. E-mail to a friend

CNN's Yousif Bassil contributed to this report.

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