Four US and Polish soldiers were killed and eleven wounded in separate attacks in Iraq in the last 24 hours.
The US military said insurgents fired a rocket-propelled grenade at a US military vehicle in southern Baghdad on Saturday, killing one soldier and wounding two others.
In a separate attack, two US soldiers were killed and three wounded on Friday by a roadside bomb near the city of Samarra, some 100 km (60 miles) north of Baghdad.
The attacks brought to 711 the number of US servicemen and women killed in action in Iraq since the invasion last year.
Elsewhere, one Polish soldier was killed and six injured when a booby-trapped car exploded next to their convoy near the Iraqi town of Hilla.
The soldier's death brings the number of Polish fatalities in Iraq to 14 since Poland took charge of the 8,000-strong multinational force in south-central Iraq last September.