Four people were killed and 10 others were injured Friday in separate gunfire and bomb attacks in northern and central Iraq, the police told Xinhua.

In northern the country, gunmen in their car opened fire on a police checkpoint in Bab al-Toub district in central Mosul, the capital of Nineveh province, killing a policeman and wounding another, a provincial police source said on condition of anonymity.

In a separate incident, a civilian was killed and six others were wounded when a roadside bomb went off near a police patrol in the Entisar neighborhood in southwestern Mosul, some 400 km north of Baghdad, the source said.

The blast apparently missed the patrol and hit civilians at a nearby marketplace instead, the source added.

In Baghdad, two soldiers and a policeman were wounded when gunmen in a car opened fire on a checkpoint in Mansour district in western the capital, an Interior Ministry source said on condition of anonymity.

Earlier in the day, an anti-al-Qaida Awakening Council group member and a gunman were killed in separate bomb explosions in the town of Garma, near the once restive city of Fallujah in Iraq's western province of Anbar, a local police source said.

Violence and sporadic high-profile attacks are still common in Iraqi cities, shaping a setback to the efforts of the Iraqi government to restore normalcy in the country after violence-torn Iraq held its parliamentary elections about seven months ago.