At least 17 people have been killed by a car bomb outside the central Iraqi town of Khalis, officials say.
The explosion, about 49 miles (80km) north-east of the capital, Baghdad, was "very strong" a provincial official told a private TV station.
Hospital sources said the death toll was expected to rise, Reuters reports.
The blast comes a day after so-called Islamic State (IS) said it was behind a suicide bomb attack on a security checkpoint in Baghdad.
At least 20 people were killed in Sunday's attack.
It is not yet known who was behind the bombing in Khalis, which is about eight miles north of Baquba, the main city of Diyala province.
In recent months, IS has lost control of some major towns and cities it seized in Iraq in 2014 and has stepped up suicide attacks in apparent response.
A police officer at a checkpoint outside Khalis said a suicide car bomber was responsible for the blast on Monday morning.
"We still have charred bodies inside many vehicles including a minibus packed with women and children," the captain, requesting anonymity, told Reuters.
At least 17 people have been killed by a car bomb outside the central Iraqi town of Khalis, officials say. 
