What intrigues me is, a 777 isn't piloted by someone with just a few flight hours. No, they are flown by very experienced pilots. If the plane did run out of fuel, I would think it would be very possible to do what Sully did with a "just" as large plane in the Hudson. If he was able to land a plane and keep it mostly intact on the Hudson, then I'm sure a 777 pilot also could NOT being under duress.
So, either it was hijacked and it was purposely or not crashed into the ocean(unlikely because no one as admitted to it), OR, it was taken out by internal govt or an external government and its now in cover up mode.
1997 Pontiac Bonneville SEi-SCRAPYARD
2000 Chevrolet Blazer LT 4X4 4.3L
2002 Chevrolet *-10 LS Ext Cab 4X4 5.7 V8