News of a major purge of Saudi Arabia's business and political leadership emerged on Sunday.
It is seen as bolstering the power of Crown Prince Mohammed bin Salman.
An anti-corruption body led by the crown prince, 32, ordered the detentions of 11 princes, four ministers and dozens of ex-ministers. Internationally known billionaire businessman Prince Alwaleed bin Talal was reported to be among those held.
US President Donald Trump backed the move by the Saudi authorities.
"I have great confidence in King Salman and the Crown Prince of Saudi Arabia, they know exactly what they are doing," he tweeted.
"Some of those they are harshly treating have been 'milking' their country for years!" Mr Trump added.
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