11.   They said his death was not the result of enemy action, but released no other details.

12.   They said his death was not the result of enemy action and was being investigated.

13.   Under Tuskegee Airmen escort, not one American bomber was lost to enemy action en route to a wartime mission.

14.   He said the air force could not rule out enemy action, pilot error or mechanical failure as the possible cause of the crash.

15.   However, it is not clear if the aircraft went down as result of mechanical failure, pilot error or enemy action, the sources said.

16.   Defence sources said at least five of them crashed due to enemy action.

17.   Since then, seven airforce planes have crashed, most of them due to enemy action.