The Islamic State (IS) militant group has claimed responsibility for a suicide bombing against a wedding south of Baghdad that killed at least 15 people on August 29.
The attack on a Shi'ite wedding near the Shi'ite holy city of Karbala also wounded more than a dozen people.
Iraqi security officials said five militants carried out the attack, but only one managed to detonate his explosives.
They said the other four were killed by security forces.
The IS-linked Aamaq news agency said four IS militants carried out the attack.