Daikilo, they were going to SHJ so if, and I say if, a cargo fire was the reason here, it will have started ,or more precisely: been noticed, at cruise altitude, in that case, it has had quite a bit of time to burn before touchdown.
LH Cargo mentions RUH as destination of the flight (see post #15). My understanding ist that the A/C was supposed to continue to SHJ and HKG after the stop in RUH.
NG1