At least seven Iraqis were killed early Tuesday, including a policeman and his 13-year-old son gunned down in northern Iraq, police said. Capt. Mohammed Jamil, a Kurd, was driving his family through their ethnically mixed hometown of Kirkuk, when a sedan pulled up alongside him, according to Col. Sardar Moufri, one of Jamil's colleagues. Four men riding in the sedan showered Jamil's car with bullets, killing him and his son, Moufri said. Jamil's wife was injured in the attack, which happened around 8 a.m., he said. About 30 minutes earlier, another senior Iraqi police officer survived an attack on his convoy in another area on the west side of Kirkuk, Moufri said. A roadside bomb exploded next to Brig. Sarhad Qadir's car, injuring three of his guards, Moufri said. The officer escaped unharmed. Kirkuk lies about 290 kilometers (180 miles) north of Baghdad. Meanwhile in a Sunni area south of Baghdad, two civilians were killed and two others wounded when a roadside bomb exploded next to their car, police added. Farther south in Hillah, about 95 kilometers (60 miles) south of the capital, another drive-by shooting killed a construction worker who was on contract with the U.S. military, police said. U.S. officials had no immediate comment on the incident. And in Baqouba, police said two Iraqi army soldiers were killed and two others injured Tuesday when a roadside bomb went off next to their patrol. Baqouba is the capital of Diyala province, and lies 60 kilometers (35 miles) northeast of Baghdad.