JOHANNESBURG (AP) — Angola received a boost to its free speech from Portugal, which refused to allow Angolan generals to stop the publication of a book exposing corruption and human rights abuses in the southern African country’s lucrative diamond mines.

Portuguese prosecutors this week threw out a libel suit against a book that alleges Angolan generals own a diamond company and a security firm that carried out killings and the torture of workers toiling in the southern African nation’s mines.