BAGHDAD - Thirteen people were killed and nine wounded in separate attacks, including a suicide bombing, across Iraq on Monday, official and police sources said.

The deadliest incident occurred in Iraq's eastern province of Diyala when Iraqi forces carried out a raid based on intelligence reports on the house of a suspected al-Qaida leader in the city of Saadiyah, some 125 km northeast of Baghdad, Ahmed al-Zarkoshi, the mayor of the city, told Xinhua by telephone.

The suspected leader, known as Hussein Abdul-Fattah, blew himself up with his wife and three of his children inside the house as soon as he felt that the Iraqi soldiers were entering his hideout, Zarkoshi said.

The powerful blast destroyed the house and killed Fattah and his family members. It also wounded an Iraqi army officer and two soldiers, he said.

Zarkoshi said that Fattah is believed to be responsible for the activities of al-Qaida militant group in towns and villages scattered in the vast area surrounding Himrin mountain chain in the provinces of Diyala and Salahudin.

In a separate incident, a policeman was killed by gunmen near al-Mansuriyah area in east of Diyala's provincial capital city of Baquba, some 65 km northeast of Baghdad, a provincial police source told Xinhua on condition of anonymity.

Also in Diyala, a roadside bomb went off at a parking lot in the city of Jalawlaa, some 70 km north of Baquba, killing a civilian and wounding three others, the source said.

In Iraq's northern-central province of Salahudin, a policeman was killed when gunmen opened fire on his car in the city of Tuz- Khurmato, some 220 km north of Baghdad, a provincial police source anonymously told Xinhua.

In a separate incident, gunmen shot dead a civilian in al-Hajaj area in north of Salahudin's provincial capital city of Tikrit, some 170 km north of Baghdad, the source said.

Earlier in the day, an Interior Ministry source reportedly said that gunmen opened fire on seven farmers who came from the nearby Diyala province to work in pollinating date trees in the orchards of Baghdad's northern area of Rashdiyah, killing four of them and wounding three others.

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.