CAIRO, Dec 17 (Reuters) - Two Egyptian military officers and two from the United Arab Emirates were killed on Wednesday when their plane crashed during a joint exercise in Egypt, official reports said.

Egypt's military spokesman said in a statement a technical failure caused the crash at 1900 local time.

The UAE's state news agency also reported the four deaths. WAM said authorities were investigating the cause of the accident.

(Reporting by Ali Abdelaty; Writing by Maggie Fick; Editing by Andrew Roche)