An explosion rocked Baghdad's north-eastern Sadr City district on Thursday evening but accounts differed on whether it caused any casualties. ISIS claimed responsibility.
Police Col Jamal Hameed told Reuters a parcel had been found at the side of the road near a market and detonated in a controlled explosion, hurting no one.
He said an earlier statement by the joint military-police Baghdad Operations Command mentioning a suicide bomb and several deaths had been released in error.
That statement had said a bomber detonated an explosive belt surrounded by security forces. Local media reported that at least eight people were killed.
A statement released by ISIS claimed that a suicide bomber had detonated an explosive vest in Sadr City, killing eight people and wounding more than 10.
Iraq declared victory over the extremist militant group in 2017, three years after it took over vast swathes of the country. Its fighters have since adapted their tactics to focus on insurgent-style attacks.