PESHAWAR, Pakistan (AP) — A pair of attacks on police vehicles by suspected militants killed at least five officers in northwest Pakistan on Tuesday, authorities said. The assailants ambushed a police vehicle and killed one officer in Kohat, a district in Khyber Pakhtunkhwa province . When police reinforcements arrived minutes later, they launched another attack and killed four more officers, police official Kamran Khan said. No group immediately claimed responsibility for the apparently