Turkish officials suspect that Khashoggi, who hasn't been seen since entering the Saudi Consulate in Istanbul last week, was murdered by Saudi agents.
The case has provoked an worldwide outcry, with U.S. President Donald Trump threatening "severe punishment" if it turns out Khashoggi was killed in the consulate and European allies calling for "a credible investigation" and accountability for those responsible.
Britain, France and Germany insisted Sunday that "light must be shed" on the whereabouts of journalist Jamal Khashoggi as they called for a credible investigation into his disappearance.
Citing an "official source", the kingdom's press agency said that that it will not succumb to any political or economical pressures and nothing can as such can harm the economical position of the kingdom. Meanwhile, Saudi Arabia has also warned retaliation for sanctions against the Kingdom, as a response to Trump's comments.
"If US sanctions are imposed on Saudi Arabia, we will be facing an economic disaster that would rock the entire world", he added. "Pointing out that US President Donald Trump had expressed anger after oil reached $80 a barrel, he asked readers to imagine what it would be like if it oil jumped to "$100, or $200, or even double that figure". But in a subsequent tweet, the Saudi Embassy in Washington thanked countries including the United States for refraining from jumping to conclusions over the case.
"To help clarify recently issued Saudi statement, the Kingdom of Saudi Arabia extends its appreciation to all, including the U.S. administration, for refraining from jumping to conclusions on the ongoing investigation", the statement said. The losses have wiped out all the market's gains in 2018, CNN said. None of the statements mentioned Khashoggi by name, or provided any further clues into what happened to the journalist.
What does the Saudi government have to say?
In the diplomatic fallout over Khashoggi's disappearance, global firms are pulling out of a high-profile investment summit due to take place later this month in Riyadh. In response, executives at some major US companies announced they would no longer attend the "Davos in the Desert" conference hosted by the country.More news: Aaron Ramsey confirms he will remain at Arsenal until his contract expires
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But Riyadh vowed to hit back on Sunday against any punitive measures while Trump has also made clear he is reluctant to curb all-important arms sales to Saudi Arabia.
A SoftBank spokesman declined to confirm whether SoftBank executives will attend next week's conference.
Stocks have dropped as much as 9 percent since Khashoggi disappeared on 2 October after walking into the Saudi consulate in Istanbul. At least some of them appear to have high-level connections in the Saudi government.
Where is Jamal Khashoggi?...
However, he told CBS News on Saturday that the USA was investigating the case which he called "really bad and disgusting" and that "there will be severe punishment". "We would have been married now".
Concern over the disappearance has seen a growing number of attendees pull out of a "Davos in the Desert" investment conference set for October 23-25, which has become the biggest show for investors to promote Saudi Crown Prince Mohammed bin Salman's reform vision.
But rather than a dissident, he saw himself as a patriot "using his pen for the good of his country", she said. Last week, Saudi Arabia allowed Turkey to search its consulate in Istanbul.