Special report: Tension escalates in Iraq

    BAGHDAD, April 8 (Xinhua) -- Four U.S. soldiers were killed and one was wounded in a roadside bomb attack northeast of Baghdad, the U.S. military said on Sunday.

    The attack took place on Saturday when an explosion hit their vehicle in Diyala province, the military said in a statement. The names of the killed soldiers are being withheld pending notification of next of kin, it added.

    More than 3,270 U.S. soldiers have been killed in Iraq since the U.S.-led invasion in March 2003, according to media count based on Pentagon figures.