A civilian was killed and seven people wounded Thursday in separate bomb and gunfire attacks in central Iraq, the police said. In Salahudin province, a civilian was killed when a sticky bomb attached to his vehicle detonated in the city of Tuz- Khurmato, some 90 km east of the provincial capital city of Tikrit, a source from Salahudin\'s operations commands told Xinhua on condition of anonymity. Salahudin province, located in northern central Iraq, is a Sunni-dominated province. Its capital city of Tikrit, some 170 km north of Baghdad, is the hometown of former President Saddam Hussein. Near Baghdad, six people were wounded when a car bomb went off outside an Iraqi army base in the town of Mahmodiyah, some 30 km south of Baghdad, an Interior Ministry source told Xinhua on condition of anonymity. In Baghdad, gunmen using silenced weapons wounded a police officer who was driving his car in Jamia district in the western part of the capital, the source said. Sporadic attacks are still common in Iraqi cities despite the dramatic decrease of violence over the past few years.