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None.
Three men are shot onscreen in the film -- the two German couriers at the opening of the film, and Maj. Strasser at the movie's climax. In none of these instances is there any blood or gore. In another scene, it is heavily implied that Ugarte has become the victim of an extralegal German execution after his arrest. Ilsa Lund pulls a gun on Rick just prior to the climax of the film in an attempt to bluff him into giving her the letters of transit.
Use of the words "damn" and "hell"
The majority of the film is set in Rick's bar, and there are numerous sequences where characters are drinking and smoking.
