Police in Iraq say a suicide bomber driving a truck with chlorine gas has killed at least 27 people in Ramadi, the capital of restive al-Anbar province.
Officials say the bomber detonated the vehicle in a densely populated neighborhood on Friday. Dozens were wounded or sickened by chlorine gas.
In Diwaniya, south of Baghdad, US and Iraqi forces arrested 27 suspects and killed three insurgents, after troops moved into the city to disrupt Shi'ite militia activity.
The US military says troops found a production facility for powerful roadside bombs capable of piercing armor.
US officials have accused Iran of supplying insurgents with the weapons (known as explosively-formed projectiles, or EFPs).
In Basra, a top police official ,Major General Mohammed Moussawi says the bomb that killed four British soldiers and a Kuwaiti interpreter on Thursday had not been previously used in the region. It was unclear what device was used in that blast.