Policemen dismantling a decoy bomb were attacked with a live blast today which killed 12 officers and left another three injured. The attack took place 15 kilometers northwest of Kirkuk. Police Brig. Sarhat Qadir said officials believed the first bomb which police set about dismantling was a lure to draw in more police before the second bomb exploded. The series of blasts were launched in the capital to accompany the visit of Secretary of State Condoleezza Rice's top deputy, Robert Zoellick, who arrived in the war-battered capital today on a one-day visit following a trip to Iraq by Defense Secretary Donald H. Rumsfeld yesterday.In one instance, a car bomb targeting Iraqi military vehicles collided with civilian traffic instead, wounding three pedestrians and destroying five cars, witnesses and Iraqi officials said. Almost concurrently, another car bomb hit a convoy of vehicles which appeared to belong to private contractors as it travelled down the road connecting Baghdad's international airport to the city centre, witnesses said. In the intervening time, twin blasts exploded near a convoy of two US Humvees and a fuel tanker as it made its way through an eastern Baghdad neighborhood, witnesses at the scene said.