A bomb blast and an ambush by gunmen on a convoy of buses near the town of Baquba killed 13 police recruits on Sunday and several more recruits were kidnapped, a local official said, according to Reuters. Another 25 police recruits were wounded, the official said, in an attack that highlights the problems the Iraqi government faces in building a strong and independent police force capable of bringing security to Iraq. The official said the buses were taking the police recruits to Baghdad from a base which was attacked by insurgents using mortars and rifle fire on Saturday. The attack on Saturday left many dead and 80 casualties, the official said.