A late-night bombing at a coffee shop in west Baghdad killed at least 22 people on Thursday, according to AP.
This is the latest spike in violence and comes just days ahead of Iraq's first elections since U.S. forces withdrew from the country.
The 10:00 pm (1900 GMT) blast struck in the mostly-Sunni Amriyah neighborhood and also wounded 35 people, security and medical officials told reporters.
Among the dead were at least three children, according to AFP.
An estimated 13.5 million Iraqis are eligible to vote for more than 8,000 candidates standing in Saturday's provincial elections, with 378 seats being contested.
Iraqi forces are solely responsible for polling day security, the first time they have been in charge without support from American or other international forces during elections since dictator Saddam Hussein was toppled in 2003.
U.S. forces eventually withdrew from Iraq in December 2011.