Six people were killed and 16 injured in separate attacks in Iraq on Friday, as the country continues to suffer from post-election political tensions, police sources said, according to dpa. A roadside bomb exploded when a civilian car carrying five people was passing in the Abu Ghreib region of western Baghdad. The blast killed three civilians and injured two others, a police source told Aswat al-Iraq news agency. Earlier on Friday, a blast in central Baghdad left four people injured, and caused severe damage to a number of shops in the area. Two civilians were killed and ten injured in an explosion inside a café in al-Askandariya district, north of Hilla. The bomb was left in a bag inside the café. In Falluja, one civilian was killed when gunmen opened fire on him using a gun with a silencer in the al-Resalah neighbourhood in the centre of the city. A security source was quoted by the agency as saying that the victim belonged to the Albu Issa tribe, which is fighting al-Qaeda. Although the level of sectarian violence in the aftermath of the 2003 US-led invasion has fallen sharply in the past two years, political tensions continue amid the unresolved problem of forming a new government after the March parliamentary elections. An Iraqi rights group, the Monitor of Constitutional Freedom and Bill of Rights, said at the beginning of July that 2,405 people had been killed in Iraq during the previous six months, as the violence spiked.