Crash site located on a mountain plateau by Norwegian Air Force F-16 between northwest corner of Lake Akkajaure (in Sweden) and the Norwegian border. "It is an obvious crash site with a diameter of 50 meters." says Daniel Lindblad, an official spokesperson for the Swedish Sjöräddningen (SAR).
Norskt postplan störtade i Sverige | Västerbottens-Kuriren
Looks like something dramatic happened. The LKP according to Flightradar24 is at FL330, there was a brief mayday, and then nothing. Let's hope the flight recorders survived.
The recovery operations may be difficult since it is mountainous terrain and the temperature is around -30C and predicted to remain so for a few days.