Car bombs and roadside bombings kill 21 in Iraq

In a village just north of Baghdad, three policemen were killed and 10 were wounded when a car bomb exploded near their checkpoint.

And in the southwestern suburbs of Baghdad, a roadside bomb struck a car carrying anti-al-Qaida Sunni fighters, killing two and wounding three, police and hospital officials said.

The Sunni militia group, known as the Sahwa, joined forces with U.S. troops at the height of the Iraq war to fight al-Qaida.

Since then, Sahwa members have been a frequent target for Sunni insurgents, who call the militiamen traitors.