The Norwegian Publishers Association issued a statement (available here).

Reacting to the judgement of the Norwegian State Attorney, Lars Erik Alfheim, to close the case against those accused of the attempted murder of publisher William Nygaard, José Borghino, IPA Secretary General said: It is unfortunate to see that the attempted murder of a publisher, an attempt driven by a book they published,  has reached a dead end in the courts. Freedom of expression needs brave publishers and we should protect and encourage them. This attack on the freedom to publish was flagrant and clearly aimed at silencing authors, publishers and translators. It shook publishing when it happened, and it is sad to see this failure to hold those responsible to account.