The same day, Turkish media published images of an alleged 15-member Saudi "assassination squad" and video of suspicious movements at the Saudi Consulate in Istanbul following Khashoggi's disappearance, putting new pressure on the kingdom amid growing worldwide concern for the writer.
This video grab made on Wednesday from CCTV footage obtained from Turkish news agency DHA shows Saudi journalist Jamal Khashoggi (right) arriving at the Saudi Arabian consulate in Istanbul on Oct 2, 2018.
The Sabah newspaper, which is close to President Recep Tayyip Erdogan, identified the team members, including several alleged security officials, and published photos of each of them, apparently taken at passport control.
A surveillance video image surfaced on Tuesday showing Khashoggi walking into the consulate in Istanbul's upscale 4th Levent neighborhood.
The kingdom has dismissed the allegation as "baseless", but has released no evidence supporting its version of events which is that Khashoggi left the consulate unharmed shortly after entering.
Turkish police were looking into two private aircraft that landed at Istanbul's Ataturk airport on October 2 at different times carrying the individuals of interest in the case.
Khashoggi was last seen a week ago entering the consulate in Istanbul to get documents related to his forthcoming marriage.
The individuals checked in to two hotels close to the consulate, the daily said.
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Protesters hold posters of Khashoggi during a demonstration organized by members of the Turkish-Arabic Media Association at the entrance to the consulate on Monday.
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He served as an adviser to top Saudi officials, but later fell out of favour with the government.
The Saudis wanted to lure him back to Saudi Arabia, but it was unclear if they meant to arrest and question him or kill him, or whether he was warned of the threat by the United States, the newspaper said.
The journalist's fiancée, Hatice Cengiz, wrote an op-ed on Tuesday expressing hope her man is still alive. Khashoggi had left his phones with her before entering and told her to wait outside and alert the authorities if he did not return. Both hotels declined to comment on the report.
Among the assassination team was a forensic expert who brought a bone saw to dismember Khashoggi's body after killing him, the Times reported on Tuesday, citing an unidentified "senior official". It has issued a blanket denial of the claims it killed Mr Khashoggi, calling them...
The Post has obtained video of the areas surrounding the consulate that purportedly shows when Khashoggi arrived at the consulate, as well as the movements of vehicles leaving the consulate two hours later.
The group then left the country on the two private jets that flew to Riyadh via Cairo and Dubai, according to investigators.
Before Khashoggi disappeared, USA intelligence intercepted communications of Saudi officials discussing a plan to grab him, the Washington Post reported.
Tuesday's statement from the Turkish Foreign Ministry's spokesman, Hami Aksoy, said Saudi authorities had notified Ankara that they were "open to cooperation" and would allow the consulate building to be searched.
Separately, Mr Khashoggi's son has told the Saudi-owned Al Arabiya news outlet that his father's disappearance has been "politicised" by foreign parties.