BBC NEWS | Middle East | Saudi uncertainty over sick king

This seems unusual to me and could indicate that the King indeed is quite ill. The King often went to King Faisal Hospital for treatment but there was usually not over security around the entire hospital. (This hospital is about 2 miles away from the King Khaled Eye Specialist Hospital where I used to work).
BBC NEWS | Middle East | Saudi uncertainty over sick king: "There is heavy security around the King Faisal hospital in Riyadh. Saudi security sources said a number of princes from the ruling family have been arriving in the capital."