At least 31 people were killed and 51 wounded when a motorcycle rigged with explosives detonated in Baghdad’s Sadr City, medical and security sources said.
The motorcycle was in a market in the Shia Muslim neighbourhood that sells used bikes and was filled with people, mostly young men.
It was not clear who was behind the bombing but violence against Shias is often blamed on the Islamic State of Iraq and the Levant, an al-Qaeda-linked group.
Also in Sadr City, officials say a bomb attached to a minibus exploded, killing five civilians and wounding 14. Meanwhile, officials say another bomb on a minibus killed four and wounded 11 in the northern Shaab district.
A police officer and two medical officials confirmed casualty figures from the attacks.