THREE IRAQI SOLDIERS WERE SHOT DEAD SATURDAY WHEN GUNMEN ATTACKED A CHECKPOINT IN MAHMUDIYA, 35 KILOMETRES SOUTH OF BAGHDAD, A POLICE SOURCE SAID, ACCORDING TO DPA. IN A SEPARATE INCIDENT, A ROADSIDE BOMB AND MORTAR ROCKETS STRUCK A US MILITARY CONVOY IN KARMAH NEAR FALLUJAH, 70 KILOMETRES WEST OF BAGHDAD, KILLING AND INJURING US SOLDIERS, A POLICE SOURCE SAID. GUNMEN RIDING IN CIVILIAN VEHICLES ATTACKED THE US CONVOY WITH ROCKET-PROPELLED GRENADES (RPGS) AND MORTAR ROUNDS IMMEDIATELY AFTER THE AMBUSH, INJURING FURTHER SOLDIERS, THE SOURCE SAID.