Assassins killed a legal advisor of the state-run North Oil Company (NOC) and seriously injured the deputy to the inspector general, the third time a high-level NOC official has been murdered in less than six months.At about 7 a.m. on Monday, unknown gunmen in a car opened fire on four NOC employees near the house of Ali Ihssan, the deputy inspector general, according to Brig. Gen. Sarhad Qadir, the director for district and sub-district police branches in Kirkuk, and two senior NOC officia…