Up to 12 policemen were killed and eight others were injured in a car bomb explosion in Wasit province, southwest of the Iraqi capital, early on Sunday, in one of the bloodiest bombings ever witnessed in the governorate.  A police source told KUNA that the deadly blast took place near a police station in the region.  Security forces cordoned off the scene. Meanwhile, other government troops carried out immediate precautions to try foil other possible bombings.