Two people were killed and two others injured on Monday in separate gunfire and bomb attacks in central and eastern Iraq, the police said.

Near Baghdad, gunmen stormed the house of an army Lieutenant Colonel in Abu-Ghraib area, some 20 km west of Baghdad, and shot him dead before they fled the scene, a local police source told Xinhua on condition of anonymity.

In Iraq's eastern province of Diyala, a policeman was killed when gunmen using assault rifles attacked him near the town of Khalis, near the provincial capital city of Baquba, some 65 km northeast of Baghdad, a provincial police source anonymously told Xinhua.

In a separate incident, a roadside bomb detonated inside an orchard in al-Hadid area, some 10 km northwest of Baquba, killing two farmers, the source said.

Also in the province, Iraqi security forces carried out search operations across the province during the past 24 hours and arrested seven suspects, including four wanted individuals, the source said.

Violence is still common in the Iraqi cities despite the dramatic decrease since its peak in 2006 and 2007 when the country was engulfed in sectarian killings.