BAGHDAD, Jan. 16 (Xinhuanet) -- Two roadside bombs rocked central and western Baghdad on Monday morning, causing casualties, a police source told Xinhua.

    "A roadside bomb remotely detonated at about 9:00 a.m. (0600GMT) in Saadoun tunnel in central Baghdad as a convoy of Sport Utility Vehicles, used by U.S. contractors, was passing by,"Captain Ahmed Abdullah said.

    The blast caused casualties in the U.S. convoy and the U.S.troops immediately sealed off the area, prohibiting Iraqi police and civilians from approaching, he said.

    Another roadside bomb attack took place at about 9:35 a.m. (0635 GMT) at the Yarmouk intersection in western Baghdad, Abdullah said.

    The attack destroyed two police vehicles and two civilian cars, he added.

    Insurgents frequently attack the U.S. troops, foreign contractors and Iraqi forces by roadside bombs. Enditem