A Christian advocacy group in Hollywood says the rating of Quentin Tarantino's new Western should be changed to stop children seeing the film.
The Christian Film & Television Commission describes Django Unchained as "ultra-violent".
According to the group, the movie shows excessive amounts of blood during shooting scenes. It also criticises the depiction of a slave being eaten by dogs and a man hanging upside down being threatened with castration.
The commission is challenging the R rating at cinemas in the US, which allows children to view the film if they are accompanied by a parent or other adult, to NC-17, which prohibits anyone below the age of 17 from seeing the film.
The group is particularly alarmed by the relaxed rating in light of the recent shooting rampage in Connecticut.
It is petitioning the Motion Picture Association of America to change the rating to minimise the risk of children emulating the violence they see in films.
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