Car bomb blasts hit parts of Baghdad on Saturday in attacks apparently targeting security forces involved in an ongoing campaign to restore order in the capital. At least four civilians were killed and nearly 10 injured, police said. In a separate blast, a bomb stashed on a minibus killed at least one passenger and injured five in central Baghdad. A car rigged with explosives blew apart near a joint Iraqi-US patrol in a mostly Sunni area in western Baghdad, damaging at least one Humvee, police said. Two civilians were killed, but there were no immediate reports of casualties among security forces. In a commercial district in central Baghdad, a car bomb exploded near a police patrol, but missed the vehicles. At least two civilians were killed and five injured, police said.