Cargolux issued this statement:
Cargolux would like to confirm that one of its aircraft, Boeing 747-400F bearing registration mark LX-OCV, suffered a significant landing incident at Luxembourg airport on Sunday evening at 18:52.
The aircraft was unable to retract its landing gear on take-off from Luxembourg. As a result, it was forced to safely dump fuel in order to return to land at the airport. On its landing roll its right body landing gear detached from the aircraft. The aircraft however came to a controlled stop and was attended to by the emergency services.
No persons on board nor on the ground suffered any injuries. The relevant authorities have been informed of the incident. The aircraft remains on the runway and recovery efforts are underway.