**At least 20 people have been killed in bomb attacks on two buses in the southern Iraqi town of Kut, police say.**The bombs were attached to the buses and exploded about half an hour apart, one report said.
Kut is in a mainly Shia Muslim area some 150km (95 miles) south-east of the capital, Baghdad.
The attack there comes days after a double truck bombing in Baghdad killed nearly 100 people, the deadliest strike in Iraq this year.
There has been an escalation of violence in Iraq since US troops pulled out of urban areas at the end of June.
But the level of violence has fallen since peaking in 2006 and 2007.