The attack was carried out in the city of Tuz Khormato on Wednesday.
The car bombing came a day after at least 32 people were killed and dozens wounded in a fresh wave of deadly attacks in Iraq.
On September 15, some 60 people lost their lives and scores more were injured in a series of car bombings and other attacks across the country.
Reports say more than 4,200 people have been killed in Iraq so far this year.
According to the United Nations, 1,057 Iraqis, including 928 civilians, were killed and 2,326 were wounded in terrorist attacks throughout the country in July -- the deadliest month since 2008.
The UN also said more than 800 people were killed across Iraq in various acts of terrorism in the month of August.
The Iraqi government says al-Qaeda-linked groups and members of the outlawed Ba’ath party are behind the surge in terrorist attacks in the country.
BA/BA