Muhammad bin Nayef

Until about four months ago, Prince Mohammed bin Salman, 29, was just another Saudi royal who dabbled in stocks and real estate.

The president committed the U.S. to defend regional governments worried about America's engagement with Iran

Saudi Arabia announced on Sunday that its new monarch, King Salman, would not be attending meetings at the White House with President Obama or a summit gathering at Camp David this week

In such a conservative society, change will be controversial, writes John Sawers

Over the past few weeks I’ve asked several western officials whether Saudi Arabia’s bombing campaign in Yemen signalled a fundamental change in Riyadh’s behaviour.

The king’s abrupt elevation of a “brash” young son leaves Washington asking: Who is Mohammed bin Salman?

Saudi Arabian King Salman reshuffled his cabinet Wednesday, appointing a new heir to the throne

When the late King Abdullah appointed his half-brother, Muqrin bin Abdul Aziz, as deputy crown prince last year, he added an unusual rider. The decree stated: "Nobody can change this decision".

When the new Saudi king installed his own team, the most eye-catching appointments involved two princes young enough to be steering the world’s biggest oil exporter for decades to come.

New allegations by an al-Qaeda prisoner in the United States have revived questions about official Saudi support for 9/11, while at home the kingdom has been re-arresting former al-Qaeda convicts