FALLUJAH, Iraq, May 6 (Xinhuanet) -- A mortar attack hit a checkpoint jointly manned by US and Iraqi forces in southern Fallujah, causing casualties, witnesses said on Friday.

    US and Iraqi soldiers opened fire randomly while responding to the attack which took place Thursday night and killed a civilian and wounded three others, witnesses at the scene said.

    "We have received a body and three injured people, one of them in serious condition," a Fallujah hospital doctor told Xinhua.

    Fighting in the Sunni Muslim enclave, some 50 km west of Baghdad, still flares as sporadic attacks were launched from time to time on US and Iraqi forces. Enditem