At least 20 people have been killed and another 10 wounded in bomb attacks on two minibuses near the southern Iraqi town of Kut, police say.
They said the bombs, which were attached to the buses, exploded on the road between Kut and Baghdad.
Kut is in a mainly Shia area some 150 km south-east of the capital, the BBC reported.
The attack comes days after a double truck bombing in Baghdad killed at least 95 people, the deadliest strike in Iraq this year.
There has been an escalation of attacks in Iraq since US troops pulled out of urban areas at the end of June.
Attachable bombs, which are known as "sticky" or "magnetic", are commonly used by Iraqi insurgents.
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