In 1975, following the death of King Faisal and the accession of King Khalid, Prince Fahd became Crown Prince and Prince Nayef succeeded him at the ministry of interior. King Khalid reduced Sudairi Seven's power concerning succession in 1977 when he was in London for treatment. Following their unsuccessful attempt to overthrow King Khalid and to install Prince Sultan as crown prince instead of Prince Abdullah King Khalid asked Crown Prince Fahd and Prince Abdullah to fully obey the existing succession plan without any change.