Police in southern Iraq say a suicide bomber killed at least 42 people and wounded 157 others when he detonated an explosive-filled minibus at a crowded security checkpoint.
The Sunday attack set ablaze 50 cars, killing those trapped inside as they waited for their vehicles to be searched.
The bombing was at the northern entrance to the Shi'ite-dominated city of Hillah, about 100 kilometers south of Baghdad.
There has been no claim of responsibility for the attack.
Iraq has been experiencing its worst violence in recent years, driven primarily by widespread discontent among its Sunni Arab minority and by the civil war in neighboring Syria. More than 1,400 people have been killed this year.