A homicide car bomb attack on an Iraqi army checkpoint in northern Iraq killed 10 soldiers Thursday, police said.

In other developments, seven Iraqis were killed and 14 wounded in two other bomb attacks by suspected insurgents.

The Iraqi army checkpoint attack occurred about 9 a.m. in Khalis, 50 miles north of Baghdad. The city is located in Diyala province, which has seen some of the worst violence recently as mostly Sunni militants are believed to have fled to the area since U.S. and Iraqi troops launched a security crackdown in Baghdad on Feb. 14.

On Wednesday, four Iraqi police officers were killed when a homicide bomber struck a police station in the Diyala city of Balad Ruz, 45 miles northeast of Baghdad. Two days earlier, a double-suicide bombing struck a paratrooper outpost in the province, killing nine U.S. troops. An Al Qaeda-linked group claimed responsibility.

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In other violence on Thursday, two suicide bombers attacked an office of the Kurdistan Democratic Party of Massoud Barzani, leader of the autonomous Kurdish region in Iraq, killing three of its guards and wounding five, police said.

The casualties could have been higher if guards had not opened fire on the two attackers, forcing them to detonate their explosives at least 50 yards from the office, police said.

The attack occurred at about 8 a.m. in Zumar, a town that is 45 miles west of Mosul, the capital of Ninevah province. It was the second homicide attack this week aimed at the KDP in that area.

On Monday, a homicide car bomber attacked a KDP office in another town near Mosul, which is 225 miles northwest of Baghdad, killing at least 10 people and wounding 20.

In a separate attack in Mosul on Monday, suspected insurgents assassinated a local KDP official in a drive-by-shooting, police said.

In central Baghdad, a roadside bomb missed a passing police patrol on Thursday but killed four civilians and wounded nine in a commercial district, police said.

A funeral procession also was held in the Shiite neighborhood of Sadr City for an Iraqi who locals said was killed in an attack by the U.S. Air Force early Thursday morning. AP television footage showed three large craters in the ground of a commercial area and several damaged shops.

The U.S. military said it was checking the report, but could not immediately confirm it.

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