The blasts in Shuala come on the eve of a planned protest in Baghdad called for by Shia cleric Moqtada al-Sadr.
A series of bomb blasts has killed at least 15 people and wounded 55 others in Baghdad, according to police and medics.
In the first attack on Tuesday, a lone bomber detonated himself around a gathering of construction workers on a commercial street in the Jadida neighbourhood in the east of the city, a police official said.
At least eight people were killed and 29 wounded in Jadida, although some said the area was hit by a roadside bomb as well as a suicide bomber.
The Islamic State of Iraq and Levant (ISIL, also known as ISIS) claimed responsibility for the attack.
Another suicide bomber targeted the Bayaa area in south Baghdad, killing at least six people and wounding 26, officials said. There were conflicting accounts of the death toll, and officials said they were likely to rise.
There was no immediate claim of responsibility for the second suicide attack, but ISIL frequently carries out attacks in Shia areas of the city.
Tuesday’s violence came two days after another suicide bombing killed six people in western Baghdad.
A day before that, 12 people were killed in the area of Tikrit, a city north of the capital.