AFP: Enormous noise - A police helicopter said the crash happened in a mountainous area called Les Trois Eveches, rising to 1,400 metres and very difficult to access.
A witness who was skiing in the area described having “heard an enormous noise”, a French television channel reported.
The French civil aviation authority said the plane disappeared from radar screens after issuing the distress call over Barcelonette, about 100 km north of the resoirt of Cannes.
Now the count is 150 passengers/flight crew.
Can’t rule out crew incapacitation due to fire or rapid depressurization