The names of the victims are published here:
Alle fire omkom - Nyheter - Innenriks - Aftenposten.no.
(The article is in norwegian) It also has a short videoclip that indicates the conditions in the area.
One additional piece of information that have come out via ATS is that it seems there may have been a radio transmission from the helicopter just before it crashed. No hint of the content of this has been released.