Who is behind this?
The big question is who operates the fake base stations in the centre of Oslo. And how long have they been in use?
Only the police, the Police Security Service (PST) and the National Security Authority (NSM) have the autority, according to the Criminal Procedure Act and the Police Law, to utilize such equipment. But no Norwegian official contacted by Aftenposten says the equipment belongs to them. Aftenposten has no reason to believe that the Norwegian government stands behind the transmitter
that seems to be a non-denial denial. No one "says the equipment belongs to them" but they don't seem to have said it doesn't belong to them.
And although "Aftenposten has no reason to believe that the Norwegian government stands behind the transmitter," they also have no reason to believe that they don't and no reason to believe that any other specific government/organization/person is behind it either