imdb lists the different runtimes for previously released versions: usa- 122'; norway- 124'; and sweden- 116'. an english-language version currently released by blue underground runs 128 minutes. the film was released as "africa blood and guts" in the usa in 1970, at only 83 minutes (over 45 minutes removed in order to focus exclusively on scenes of carnage); according to the text of the box for the blue underground release, directors jacopetti and prosperi both disowned this version. an r-rated version runs at 80 minutes.