Over the weekend, US President Donald Trump vowed "severe punishment" if it were proven that Saudi Arabia killed Khashoggi, and sent Secretary of State Mike Pompeo to the kingdom on Monday to discuss the incident.
James Dorsey, a fellow at Singapore's S. Rajaratnam School of International Studies, said Saudi Arabia was stepping up moves against criticism.
Turkish officials say they believe he was murdered there and his body removed.
Turkish sources allege he was killed by a 15-strong team of Saudi agents, but Riyadh insists that he left the consulate unharmed.
On stage at Mipcom in Cannes on Monday, Endeavor CEO Ari Emanuel said he was "personally concerned" about the situation. Many in D.C.do, however, rub shoulders with Washington Post columnists - of which Khashoggi was one - and thus, his apparent murder has forced many American lobbyists, corporate titans, and public officials to feign shock and concern at the revelation that the totalitarian, Islamist government of Saudi Arabia does not respect the human rights of its dissidents.
Saudi and Turkish investigators have been seen entering the Saudi consulate where Mr Khashoggi was last seen.
His remarks prompted Saudi Arabia to threaten to use its economic muscle to respond to any punitive measure but Rai al-Youm, a pan-Arab newspaper based in London, said the kingdom might have to ready itself for new "milking" by the US.
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Treasury Secretary Steven Mnuchin is still scheduled to attend the October 23 Future Investment Initiative in Saudi Arabia, White House economic adviser Larry Kudlow told Fox News.
While the president vowed to reporters that, "We are going to leave nothing uncovered" he suggested that "rogue killers" could've been behind Khashoggi's disappearance.
The UK, Germany and France have demanded a credible investigation into the disappearance.
The New York Times is also citing a person familiar with the Saudi plans, who says the Saudi government is preparing a scenario that would protect Prince Mohammed Bin Salman from blame. There have been suggestions that Khashoggi was previously concerned he was about to be captured by the Saudi court. "Imposing any type of sanctions on Saudi Arabia by the West will cause the kingdom to resort to other options", he said.
Khashoggi was United States resident and wrote articles for The Washington Post, splitting his time between Virginia, London, and Istanbul since he left Saudi Arabia in June 2017.
The Arab News' headline was above a front-page editorial by Dubai-based real-estate tycoon Khalaf al-Habtoor, calling on Gulf Arab nations to boycott worldwide firms now backing out of a planned economic summit in Riyadh later this month.