KIRKUK, Iraq (AFP) - A US military post in the northern city of Kirkuk was hit by five Katyusha rockets, sparking relatiatory US shell fire, Iraqi police reported, without saying if there were any casualties. They said a school in Kirkuk was also hit by a mortar Tuesday, and a bomb exploded in front of a dry cleaners used by the US forces. "A US position located behind the technical college at the entrance of Kirkuk was hit by five Katyusha rockets," Lieutenant Ammar Hassan al-Abbadi said. "The attack happened at 9:00 pm (1800 GMT) and the rockets were fired...