Six people were killed and 30 wounded this morning when a roadside bomb exploded near two coaches in the western Iraqi city of Ramadi.
The buses were carrying passengers to Ramadi, 110 kilometres west of Baghdad, from Ta'mim, a small town nearby.
Ramadi is the capital of the western province of Anbar.
Attacks on civilians are rare in Anbar, but the province has been one of the focal points of an insurgency by Iraq's Sunni Arab minority and foreign fighters against the Shia and Kurdish-led government and US forces.
In Baghdad three people, who appeared to be Westerners, were killed and two were injured in a roadside bomb attack at a checkpoint near the heavily fortified "Green Zone" area, police said.
No further details were available.
Elsewhere, US air strikes killed 37 suspected insurgents in the western Iraqi town of Ubaydi near the Syrian border this morning.