A bomb exploded on a minibus packed with passengers outside the Shiite holy city of Karbala, killing 12 people and wounding five others, Iraqi security officials and the state news agency said.
This was one of the biggest attacks targeting civilians since the extremist Islamic State group was declared defeated inside Iraq in 2017.
The group’s sleeper cells continue to wage an insurgency and carry out sporadic attacks across the country. The explosion occurred on Friday night as the bus was passing through an Iraqi army checkpoint, about 10 kilometers (6 miles) south of Karbala in the direction of the town of al-Hilla.
The officials said all of the dead were civilians killed in the explosion and subsequent fire in the bus. All the officials spoke on condition of anonymity in line with regulations.
There was no immediate claim of responsibility for the attack. It took place during a holy period marked by Shiites in Iraq between two important religious events, Ashoura and Arbaeen.