Afghan officials say an aircraft belonging to the NATO-led coalition that was called to assist Afghan police at a highway checkpoint opened fire and mistakenly killed five Afghan police officers. A spokesperson for the governor in the eastern province of Nangarhar said the police officers had come under fire and called for air support from the U.S.-led International Security Assistance Force. Coalition spokespeople provided a slightly different version of the incident to the Associated Press, saying it occurred during an operation involving both international and Afghan troops. They said an investigation is underway. [Please note: This headline has been updated to reflect a correction issued by the Associated Press.]