A car bomb killed two Kurdish security agents Sunday morning in Iraq's oil-rich northern city of Kirkuk, police said. The men were traveling in a civilian car through downtown Kirkuk when a parked car bomb exploded next to their vehicle, said police Brig. Sarhat Qadir. Three pedestrians were wounded, he said. South of the capital, a roadside bomb went off next to an Iraqi police patrol in Nasiriyah, wounding two policemen, authorities said.