Witness Sakhi Ahmad said the explosion took place on Kabul International Airport Road , near the Supreme Court compound . NEW : Two were U.S. military personnel , and the third was Afghan , a source said . ISAF says two of its members were killed . 13 Afghan civilians are among the dead . US Embassy sounds ` ` duck - and - run '' alarm as building fills with smoke .
NEW : Two were U.S. military personnel , and the third was Afghan , a source said . ISAF says two of its members were killed . 13 Afghan civilians are among the dead . US Embassy sounds ` ` duck - and - run '' alarm as building fills with smoke .