BAGHDAD (AFP) - Five people including three police officers were killed in attacks across Iraq on Tuesday, security and police officials said. In Baghdad, two policemen were shot dead by gunmen as they patrolled in the centre of the capital, an interior ministry official said. One gunmen was also killed in the attack. In the restive northern city of Mosul, meanwhile, an officer was killed and three others injured by a roadside bomb targeting their patrol in the centre of the city, said a police official who declined to be identified. Also in Mosul in a separate incident, a civilian was killed by armed men, the official added. In a town east of Baquba, north of Baghdad, a police officers nephew was kidnapped and murdered, a security official said. The killings come just two weeks after US troops withdrew from Iraqs urban centres as part of a security pact between Baghdad and Washington that calls on 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 militarys urban pullout, with 437 Iraqis killed in June the highest death toll in 11 months.