I'm assuming it wasn't a hijacking because I figured that probably wouldn't have resulted in the sudden, catastrophic demise of the aircraft.
Well, I don’t know, they are saying that same airline had a plane crash during a highjacking some years ago.
I suppose if the pilots resist they can lose control and the plane can crash, although clearly that is not the intent of a highjacking.
It’s pretty interesting that not much information is being revealed about 5 people who did not board and their luggage was taken off the aircraft.