The Saudi officials tried to rip out a camera inside the Istanbul consulate on October 2, the day Khashoggi disappeared, and days later tampered with cameras at a police security booth in the building, Al-Jazeera reported, citing Turkish media.
The cleanup team arrived in Istanbul on Oct 11, nine days after Khashoggi's death, and visited the consulate every day from Oct 12 to Oct 17, according to Sabah.
The source said the chemist and toxicologist were tasked with getting rid of evidence before Turkish investigators were given access to the Saudi consulate and consul's residence.
Five months after quitting the U.N.'s top human rights body, the United States has resurfaced at a Human Rights Council venue - calling for a "thorough, conclusive and transparent" investigation into the killing of Saudi journalist Jamal Khashoggi.
The reactor launched on November 5 is among 16 that Saudi officials, citing archrival Iran's continued development of nuclear energy, have said they plan to build over the next two decades at a cost of $80 billion.
They described their father as "courageous, generous, and very fearless", and they said they still had faith in the Saudi king to bring their father's killers to justice.More news: US to grant Iraq waiver over Iran sanctions for gas, food items
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Khashoggi was a former insider in Saudi royal circles who went into self-imposed exile in the USA a year ago.
A Turkish source also told Al-Jazeera on Tuesday that Ankara had briefed Central Intelligence Agency director Gina Haspel and European officials on the "full picture" of the Khashoggi murder, in an attempt to increase American and European pressure on Riyadh to disclose more details.
Salah and Abdullah Khashoggi, who described their father as "courageous, generous and very fearless", said they have suffered weeks of agony and uncertainty following his disappearance and death. "I talked about this with the Saudi authorities and I just hope that it will happen soon".
Khashoggi's remains are still missing. "Or he had a peaceful death", Abdullah Khashoggi told CNN in Washington in an interview aired on Sunday. On Monday, a Turkish official said that at least two members of a team that Saudi Arabia sent to investigate Khashoggi's killing were actually there to cover it up.
The head of Japanese tech group Softbank has condemned the murder of a journalist by Saudi security forces, but said his company must continue to work with Riyadh.
'I think it is Saudi Arabia's responsibility to find out what happened to Khashoggi's body and inform us about it, as the 15-man team are still in Saudi Arabia, ' Cavusoglu said.
We made it very public.