It exploded early Sunday on a busy street in the Karada neighborhood, where people were gathering to shop and socialize during a lively Ramadan night. People had just finished watching a soccer match.
Iraq's interior ministry said "indirect fire" and tear gas were used against the scores of demonstrators in the heavily fortified area of the capital. The government declared a citywide curfew.
Outdoor markets in two Shiite neighborhoods were struck by blasts on Tuesday. A suicide bomber hit a third neighborhood. Then an SUV exploded in Sadr City, another Shiite region of the capital.
The Islamic State has claimed that it carried out three attacks in different parts of the Iraqi capital. Two of the bombings targeted checkpoints, while another hit a crowded outdoor market.
Some of the loveliest cities hug great rivers: Cairo on the Nile, Paris on the Seine. Baghdad's lifeblood is the Tigris. After years of war, commuter boats and even a rowing club ply its waters again.