Unconfirmed video published on Facebook showed what appeared to be four separate fires, including two cars engulfed in flames, under a highway overpass near the mall amid the wailing sirens of first responders.
IS`s Amaq news agency said that two suicide bombers, one wearing a vest and the other in a car, had targeted "a gathering of Shi`ites" on Palestine Street.
The militants have lost ground in the past year to U.S.-backed government forces and Iranian-backed Shi`ite militias. Yet such bombings show the group can still strike outside the territory its controls in northern and western Iraq.
A car bombing in July killed 324 in one of the deadliest such attacks since a U.S.-led invasion toppled Saddam Hussein 13 years ago.
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