In Iraq's eastern province of Diyala, gunmen with assault rifles attacked a checkpoint jointly manned by policemen and fighters of a government-backed Awakening Council group in a village near the provincial capital city of Baquba, some 65 km northeast of Baghdad, the source told Xinhua on condition of anonymity.
A fierce fighting erupted between the two sides and resulted in the killing of two group fighters and a policeman, while two of the attackers were also killed in the clash, the source said.
The Awakening Council group, or Sahwa in Arabic, consists of armed groups, including some powerful anti-U.S. Sunni insurgent groups which fought al-Qaida militants in the Sunni Arab areas after the U.S.-led invasion of Iraq.
In Iraq's northern province of Nineveh, a booby-trapped car detonated in central the provincial capital city of Mosul, some 400 km north of Baghdad, killing a civilian and wounding three people, including two policemen, a provincial police source anonymously told Xinhua.
Insurgents continue daily attacks including suicide bombings across Iraq since the U.S. troops pulled out of the country earlier last month.