LONDON, Aug 25 (Reuters) - The two crew of a Harrier fighter jet ejected to safety moments before it crashed and burst into flames, Britain"s Defence Ministry said on Friday. A ministry spokeswoman told Reuters the two men ejected 50 ft (15 m) above the runway after the Harrier developed problems on its final approach at the Royal Air Force"s Boscombe Downs air base in Wiltshire on Thursday. "They are both okay. One had some minor back injuries," the spokeswoman said. "At this stage we do not know why the aircraft got into difficulty." The aircraft, which belonged to the Defence Evaluation and Research Agency, was destroyed in the crash, she said. The two-seater T-10 model was a training variation of the standard one-seater model.