AlHijjah 10, 1433, Oct 26, 2012, SPA -- Iraqi authorities say gunmen have killed two policemen in an attack on a security checkpoint north of Baghdad. Police say the attack took place early Friday. Gunmen opened fire on a group of policemen at a checkpoint in Buhriz. Two other policemen were wounded. Buhriz is about 60 kilometers (35 miles) north of Baghdad. A medic in a nearby hospital confirmed the casualties, AP reported.