Preliminary data based on the notification from the Belgian authorities:
During the flight, at 00:50 UTC, when the airplane was cruising at FL400, engine 1 failed. The crew declared a PAN-PAN and considered a precautionary landing in Djerba (DTTJ). Engine 1 was successfully relighted afterwards and the crew decided to continue the flight towards Brussels EBBR). When in approach towards Brussels, at 04:37, engine 2 failed several times and relighted automatically. The airplane landed safely in Brussels with both engines operating.