(KUNA) -- Four Iraqi citizens including a woman were killed Saturday in separate attacks at Mosul province north of Iraq, said a police source. Colonel Dhaqil Qasem told the press that masked gunmen attacked road workers at a highway near the borders with Syria. The attack resulted in the death and injury of four workers, the Iraqi police official added. He pointed out that two Iraqi citizens were also killed in two separate incidents in Mosul city.Violence was still occurring in the country despite numerous security plans conducted by the Iraqi government during Ramadan which includes imposing curfews in several Iraqi cities.