A US military spokesman said on Wednesday that three soldiers from the 1st Armoured Division were injured when their convoy came under attack at al-Dorah on the southern outskirts of capital Baghdad on Tuesday night.

Another soldier from the 4th Infantry Division was wounded when his convoy was hit by rocket-propelled grenades at Balad, in the north of Baghdad.

Up to 75 US soldiers have been killed in Iraq since US President George Bush declared major combat over on 1 May.