A file photo dated 14 August 2012 shows Saudi Arabia’s King Abdullah bin Abdul Aziz. Saudi royal court said in a statement on December 31st 2014 that Saudi King Abdullah bin Abdul Aziz has been admitted to a hospital in the capital, Riyadh, for medical tests, without giving further details about the tests. King Abdullah, 90, underwent an operation to tighten a loose ligament in his back in 2012. It was his third back surgery since he became the ruler of the world’s top oil exporter in 2005. (Photograph:  EPA)

Saudi Arabia’s elderly King Abdullah bin Abdulaziz was admitted to a hospital in Riyadh on Wednesday for medical tests, state media reported on Wedne(...)