Two car bombs exploded in Baghdad the night of September 4, killing around 20 people and wounding more that 30 others, police sources said.
One of the bombs exploded in Saadoun street in central Baghdad, killing seven people and wounding 19 others.
The second blast killed 12 people and wounded 30 in the mainly Shi’ite neighborhood of Kadhamiya, police said.
The explosion was the fourth attack in Shi’ite districts of the capital in two weeks.
The Saadoun street bomb went off outside a Turkish airlines office, causing significant damage to the building and other shops in the area.
Islamic State Sunni militants, who have declared a 'caliphate' in swathes of Iraq and Syria, have claimed several recent Baghdad bombings.
The United Nations said September 1 that at least 1,420 people were killed in Iraq in August as sectarian violence raged in the country's centre and north.
A further 1,370 Iraqis were wounded and 600,000 people forced to flee as Islamic State militants pushed into land controlled by Kurdish troops and targeted religious minorities.
The U.N. said the casualty figures could be far higher but it could not get independent verification of reports of hundreds of incidents in areas under Islamic State's control.
Violence killed 1,737 people, mostly civilians, in Iraq in July, and 2,400 in June, the U.N. data showed.