MOSUL, Iraq (AFP) - Eight people were killed, including six police officers, in attacks in the Iraqi cities of Mosul and Ramadi on Monday, security and medical officials said. In one attack, a policeman and a civilian were killed in a drive-by shooting targeting a police patrol in the centre of Mosul, the capital of the northern province of Nineveh. Two traffic policemen were also shot dead one in central Mosul and the other outside his house. A fourth policeman was killed when a roadside bomb placed on a main road in southern Mosul exploded as he tried to defuse it. In the western city of Ramadi, three people were killed including two policemen in a car bomb blast, the second attack there in a week. Four other people were wounded, including two other police officers, in the bombing near the provincial government HQs in the city centre. Ramadi is the capital of the western province of Anbar, a one-time bastion of the Sunni insurgency that has seen a sharp drop-off in violence over the past 18 months as local tribes allied themselves with US-led forces. Last week, six people were killed in a suicide car bombing near a mosque in Ramadi. Mondays attacks come just three weeks after US troops withdrew from urban centres in line with a security pact between Baghdad and Washington that calls for American forces to leave Iraq by the end of 2011. Violence had dropped markedly throughout the country in recent months, but attacks increased in the run-up to the US military pullback, with 437 Iraqis killed in June the highest death toll in 11 months. Attacks remain particularly common in Baghdad and Mosul.