A roadside bomb targeting an Iraqi Army convoy killed one civilian and wounded five others Saturday at a busy intersection in central Baghdad, police said. Four of the wounded were Iraqi soldiers, a police officer said on condition of anonymity out of security concerns. In western Baghdad, a mortar round landed on a house in Ghazaliyah, killing another civilian, another officer said on the same condition of anonymity. Meanwhile in northern Iraq, a police lieutenant colonel was gunned down Saturday morning on his way to work. Ismail Salim Khudaeir, worked as deputy director of the provincial security affairs department in Kirkuk, a mixed city about 290 kilometers (180 miles) north of Baghdad. He was killed in a drive-by shooting around 8 a.m. while walking to work, said police colonel Anwar Qadir.