Crown Prince Sultan, who was around 86, had been in the United States for medical treatment since June. His death has thrown his brother Prince Nayef into line to succeed King Abdullah as leader of the key oil producer country.
Serum Institute of India chief Adar Poonawalla will pay 138 million (about Rs 1,444 crore) for a Mayfair mansion in London in one of the city's most expensive home sales of the year
Crown Prince Al Soud, 81, was the deputy minister of aviation and defence, and was one of the top figures in the Saudi kingdom.
India has maintained it is against any third party mediation to resolve all differences, including on Jammu and Kashmir, with Pakistan.
In January 2006, King Abdullah became the first Saudi monarch in 51 years to visit India.