Killer Force, also known as The Diamond Mercenaries, is a 1976 thriller film directed by Val Guest and starring Telly Savalas, Peter Fonda and Christopher Lee. It was a co-production between the Republic of Ireland, Switzerland, United Kingdom (post production at Twickenham), and the United States and was filmed primarily in South Africa. Its plot is about a gang of criminals who plan a major robbery of a diamond mine.