Ok – this is a bit crazy by now. I think 2 things
1. Someone knows a lot more than they are letting on. The military (of several countries) should know where it is. What’s it say if they can lose a big aircraft.
2. I think terrorist with inside help seized the plan, killed the passengers, and landed at some secluded airstrip. The plane will be turned into a giant flying dirty bomb to be used in the near future.
Someone better find this plane and the people behind its theft ASAP.