 To remedy this situation, Idris in 1953 designated his sixty-year-old brother to succeed him.When the original heir apparent died, the king appointed his nephew, Prince Hasan ar Rida, his successor.When a group of young officers and soldiers seized power under the leadership of Muammar Gaddafi on 1 September 1969, the Crown Prince, who was then ruling the country on behalf of King Idris was imprisoned for two years and subsequently reduced to complete isolation during the following seven years under house arrest.