Iraqi police say a suicide truck bomber has killed at least five people at a checkpoint west of Baghdad. An Iraqi police official says the truck exploded Monday at a police checkpoint in Khan Dhari, killing five police officers and wounding 13 others. Hours earlier north of Baghdad, a female suicide bomber knocked on the front door of the home of the leader of a local volunteer Sunni militia and blew herself up, killing him. An Iraqi police official says the blast killed Ahmed Khamees, the local commander of the Sons of Iraq volunteer force in Tarmiya, north of Baghdad. The officials in both cases spoke on condition of anonymity because they were not authorized to speak to the media.