BAGHDAD (AFP) - Insurgents killed at least nine people in Iraq on Tuesday, including four policemen in the northern city of Mosul, security officials said. Gunmen fired on a group of eight policemen as they were on their way to work in Mosul, said a local police officer who declined to give his name. Four of them were killed and the others were wounded, he said, adding the attack took place in the city's western Al-Amil neighbourhood. Iraqi and US commanders say Mosul, where security forces are carrying out a series of military assaults targeting the jihadists, is the last urban bastion of Al-Qaeda. In Baghdad, five people were killed and 15 wounded in a car bomb attack in the capital's Al-Jihad neighbourhood, a security official with the defence ministry said. Violence in Iraq is at a four-year low but insurgents have still managed to carry out attacks in the country despite sweeping military operations by security forces.