Liveried staff milled around under the ornate chandeliers of the hotel lobby, greeting a trickle of arrivals as they checked into rooms.
Prince Alwaleed, one of the country's top international investors, was freed on Saturday, nearly three months after being taken into custody.
Sheikh Saud al-Mojeb said he has completed inquiries into 381 high-profile corruption suspects and decided to keep 56 in custody and free the rest.
His release came hours after he told Reuters in an exclusive interview at the opulent Ritz-Carlton hotel in Riyadh that he expected to be cleared of any wrongdoing.
Qatar’s economy performed better than expected last year and required “minimal” government support to blunt the effects of a trade and diplomatic embargo by Saudi Arabia and three other Arab countries, the Minister for Economy and Commerce, HE Sheikh Ahmed bin Jassim bin Mohamed al-Thani, has said.
A controversial member of the Qatari royal family, who was allegedly held against his will in the United Arab Emirates (UAE), has accused Saudi Arabia and the UAE of orchestrating a months-long Gulf crisis in order to seize Qatar's wealth, Al Jazeera reported.
Crude production of 9.9 million barrels per day in the US was now at the highest level in nearly 50 years, "putting it neck-and-neck with Saudi Arabia, the world's second largest crude producer after Russia," the IEA said.
In its World Report 2018, which reviews human rights practices in more than 90 countries, the rights group reported it had documented 87 unlawful attacks by the Saudi-led coalition fighting in Yemen.
Saudi Arabia said Wednesday it had intercepted a fresh missile attack by Yemeni rebels on the south of the kingdom and renewed its accusations that arch-foe Iran had armed them.
Saudi media on Saturday had reported the princes arrested after gathering outside Qasr al-Hokm, a historical palace in Riyadh, in protest against a government decision to stop paying the water and electricity bills of royals.
The Committee to Protect Journalists (CPJ) has called on Saudi Arabia to release a local journalist who was reportedly arrested this week after criticising the government.