A suicide car bomber rammed an explosives-laden vehicle against the wall of a police station near the northern city of Mosul on Thursday, killing three policemen and wounding four others, AP quoted police as saying. It was the fifth suicide attack in Iraq this week and shows that insurgents can still carry out assaults despite security gains in urban areas. Four suicide bombers killed 57 people in Baghdad and the northern city of Kirkuk on Monday. The Thursday attack occurred at a police station in the Qayara area about 30 miles (50 kilometers) south of Mosul, according to a police officer who spoke on condition of anonymity because he was not authorized to speak to the media.