The paper's empty column was titled "A missing voice" and had Khashoggi's byline.
"The request that America made to Saudi Arabia and other OPEC countries is to be sure that if there is any loss of supply from Iran, that we will supply that", Mohammed Bin Salman, heir to the Saudi throne, said in an interview.
The New York-based Committee to Protect Journalists also expressed concern, saying "given the Saudi authorities' pattern of quietly detaining critical journalists, Khashoggi's failure to emerge from the Saudi consulate on the day he entered is a cause for alarm".
Since then, reports as to his whereabouts have been conflicting.
Saudi Crown Prince Mohammed bin Salman said the kingdom has met its promise to Washington to make up for Iranian crude oil supplies lost through USA sanctions.
He went on to tell the USA business publication that the consulate has "nothing to hide".
Saudi Arabia's Crown Prince Mohammed bin Salman said the kingdom's main sovereign wealth fund (PIF) will surpass its target of increasing its assets to $600 billion by 2020, as part of a plan to reduce the economy's dependence on oil.
Ankara and Riyadh have given contradictory versions of the circumstances of Khashoggi's disappearance. According to sources from both Saudi Arabia and Kuwait, one of the key points of contention was the resumption of oil production in the Partitioned Neutral Zone which was...
Labor Dept.: Unemployment, job growth down in September
The politically sensitive goods trade deficit with China increased 4.7 percent to a record high of $38.6 billion. Applications fell to 202,000 during the week ended 15 September, which was the lowest level since November 1969.
Saudis murdered journalist in Istanbul consulate, says Turkey
A Saudi Arabian journalist was murdered in an assassination operation at the country's Istanbul consulate, investigators believe. Saudi officials say he left shortly afterwards but his fiancee, who was waiting outside, said he never came out.
Fabregas commits future to Chelsea and reveals he wants a new contract
We've had great success, won many things. "I feel I still have a lot of football left in me but it is now up to the club". At the moment I'm good - if I'm the best, If I'm not I don't care. "He's a very important player for us".
An official with the Saudi Embassy in Washington, D.C., told NPR's Jackie Northam that Khashoggi was neither in the consulate nor in custody.
A Saudi columnist remained missing as supporters rallied outside the Saudi consulate in Istanbul calling for his "release" despite Riyadh's denials that he was being held there.
"Where is Jamal?" Hatice said. We didn't want to move fast with unknown investors.
'I believe, and I'm sorry if anyone misunderstands that, but President Obama, in his eight years, worked against many of our agenda - not in Saudi Arabia, but also in the Middle East, ' said MBS, as he is called.
Yemeni activist and 2011 victor of the Nobel Peace Prize Tawakkol Karman was among the demonstrators and hit out at the Saudi authorities. She told AFP she believes Khashoggi "was kidnapped in this gangster's den that is supposed to be a consulate".
'As journalists we are concerned by the fate of Jamal. "And the Turkish government must assume its role and deal with the case of Jamal Khashoggi because Turkish sovereignty has been violated", she added.
"So Saudi Arabia needs something like around 2,000 years to maybe face some dangers".
On his relations with Trump, Prince Mohammed said: "I love working with him". He moved to the United States more than a year ago, where he continued his commentary about his country both in print and on television. "I won't be able to rest easy until you appear safe and sound".