The likely options as I see them are
1. The plane was hijacked by terrorists for some near future plot. Landed in an ex-Soviet republic.
2. The plane was hijacked for some cargo on the plane. Landed in an ex-Soviet republic.
3. The plane crashed somewhere in the Indian ocean.
Based on the fact that no contact seems to have been made, if the first two are what happened then I don't expect the passengers or crew to be alive.
l'Audace, toujours l'audace
I don’t have pet peeves; I have major, psychotic hatreds. - George Carlin
Even if you have a crown and sit at a throne
In the end you will have nothing
Even if you are destined for great riches
In the end you will return to the dust
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