At least 40 people have been killed in a series of bomb attacks in and around the Iraqi capital, Baghdad.
Bus passengers were heading to an Iranian opposition base
Eleven people died in an explosion near a bus north-east of Baghdad, police said, while in the city itself, about 28 died in five separate bombings.
Iraqi insurgents have carried out almost daily attacks for months, aimed at civilians and security forces.
The bus attack appeared to target workers at a base of the Iranian opposition movement Mujahideen e-Khalq.
It happened just after dawn near Khalis, 80km (50 miles) north of Baghdad in Diyala province.
The province, a mixed Sunni-Shia area which includes the city of Baquba, has been one of the bloodiest regions of Iraq during the insurgency, which began in the months after the 2003 US-led invasion.
In one of the other attacks on Monday, seven people were killed when a minivan exploded near a street market.
The Associated Press news agency reported that a car parked near Baghdad's main Sunni Abu Hanifa mosque blew up killing at least nine Iraqi civilians and wounding 25.
A second bombing in the same district killed 12 people and wounded 24 when a car bomb targeted an Iraqi army patrol, police said. Most of the victims were students from a nearby university.
Another attack was apparently aimed at a US military convoy and killed at least one civilian and wounded 10.
On Sunday, a roadside bomb has killed two British soldiers in the city of Basra, in southern Iraq.
It brought the UK death toll in May to nine, after five were killed when a Lynx helicopter crashed and two others died in a roadside bomb.