Iraqi policemen inspect the site of a car bomb attack in the northern city of Kirkuk on March 5, 2013.
Security sources say at least 17 people have been killed and 43 others injured in a spate of terrorist attacks in central and northern Iraq.
Tuesday was another bloody day for Iraqis, who are weary after years of violence and instability.
Two car bombs struck police targets in the oil-rich city of Kirkuk, situated about 290 kilometers (175 miles) north of Baghdad. Five policemen were killed while 17 people -- among them some police officers -- sustained injuries in the blasts, Xinhua reported.
An explosive-laden car was detonated near a football pitch in the town of Khan Bani Saad, which is located about 35 kilometers (20 miles) north of Baghdad. A provincial police source, speaking on condition of anonymity, said three people were killed and 20 others injured in the attack. He added that five of the injured are in critical condition in hospital.
Earlier in the day, a local leader of the pro-government and anti-al-Qaeda Sahwa (Awakening) militia was shot dead by two gunmen on a motorcycle in front of his house in western Baghdad in the Abu Ghraib neighborhood.
In the town of al-Siniyah, located some 200 kilometers (124 miles) north of Baghdad, gunmen broke into the house of another anti-al-Qaeda leader in the early hours of Tuesday morning and shot and killed the leader's father and mother and critically injured him before they fled the scene.
Elsewhere, two people were killed and a third was injured when two gunmen on a motorcycle opened fire on them in a village near the town of Tuz Khurmato, situated 170 kilometers (105 miles) north of Baghdad.
The mayor of the northern city of al-Qayyara and two of his bodyguards were seriously injured when a group of drive-by shooters sprayed his convoy with bullets.
Gunmen attacked a real estate office in the north Baghdad neighborhood of Sabi al-Boor, killing two people and injuring another two.
And two civilians were shot dead in two separate shooting attacks in the al-Saidiyah district of southern Baghdad.