Truly a sad accident and my deepest condolences go out to those affected. NLA does a very important job as a not-for-profit-foundation it is contracted by the Norwegian government to supply air medical services to a majority of the Norwegian mainland.
That being said the video posted above by GenuineHoverBug scare me as it appears that the second helicopter coming in also would have hit the power cables had they still been in place.
Google StreetView:
http://i.imgur.com/iyykyJC.png
Video snapshot:
http://i.imgur.com/MRTuG61.png