Special report: Tension escalates in Iraq 　

    BAGHDAD, Dec. 6 (Xinhua) -- Three U.S. soldiers were killed and another wounded in a "complex attack" involving a roadside bomb and small arms fire north of Baghdad, the U.S. military said on Thursday.

    On Wednesday, a military statement put the death toll at two and two others wounded in the attack that took place on Tuesday when the troops were conducting operations Salahudin province.

    The latest statement raised the death toll to three after one of the wounded soldiers died Wednesday of his fatal wounds sustained in the attack.

    The name of the deceased soldier is being withheld pending notification of next of kin, the statement added.

    The latest death brings the number of U.S. soldiers who have been killed in Iraq to more than 3,886 since the U.S.-led invasion in 2003, according to media count based on Pentagon figures.