777
To me it looks like the landing gear was for whatever reason retracted prematurely so when the aircraft settled back on the runway, which can sometimes happen during a go around it crashed on its belly fuselage.
These kind of accidents have happened before.
If it turn out to be that scenario then the flight crew would be to blame.
Nevertheless the cabin crew did an outstanding job getting out everyone alive and should be commended.
And yes, this is the first hull loss in EK history and the worst accident to date.
Also, I can confirm it was an emirati Capt. and expat FO.
soon we will know exactly what happened.