The pro-government Sabah newspaper reported on Tuesday that the Saudis tried to rip out the camera inside the consulate on October 2, the day Khashoggi was murdered.
They also tried to tamper with cameras at the police security booth outside the building.
The body of Khashoggi, a former Washington Post columnist and critic of the powerful Saudi Crown Prince Mohammed bin Salman, remains missing.
According to the report, on October 6, at 1am local time, a consulate member staff went into the police security post outside the Saudi consulate to access the video system.
Sabah reported that the staff member put in a digital lock code into the system, which did not dismantle any cameras; rather the code was to prevent access to any videos showing movement at the entrance, including Khashoggi’s arrival at the consulate.
Al Jazeera’s Andrew Simmons, reporting from Istanbul, said that their attempt was, in any case, irrelevant because the police had already deciphered the coding and accessed the system, retrieving a copy of the video well before the attempted tampering.
“All of this demonstrates, according to Turkish officials, in terms of the … whole set of procedures, that there was an effort by the Saudi Arabian consulate to once again tamper with evidence,” Simmons said.
“This follows a pattern of leaks which demonstrate beyond any doubt, according to the Turks, that the Saudis weren’t out to investigate a murder, they were out to cover it up.”
Turkish authorities claimed last month that security camera footage was removed from the consulate and that Turkish staff were told to take a holiday on the day Khashoggi was scheduled to visit the consulate to pick up a document for marriage.
On October 23, Turkish President Recep Tayyip Erdogan said in a speech to ruling party legislators in Ankara that the murder was planned days in advance by a Saudi team.
He said that the surveillance system at the consulate was deactivated on purpose.
“First [the Saudis implicated] removed the hard disc from the camera system,” Erdogan said. “This is a political murder.”
Erdogan said he wanted answers to many questions, such as who gave the orders to kill Khashoggi and what happened to his body.
On Friday, Erdogan said that the order to kill Khashoggi came from the “highest levels” of the Saudi government, but added he did not believe King Salman was to blame.
Meanwhile, Turkish Foreign Minister Mevlut Cavusoglu reiterated on a visit to Japan on Tuesday that it is “obvious” that the 15-member team from Saudi Arabia had arrived in Istanbul with instructions to kill Khashoggi.
However, Ankara has not been able to receive an answer from Riyadh as to who specifically ordered Khashoggi’s murder.
“We have to find out who gave these instructions. This is the simple question that we have put to the Saudis as well. We made it very public. It’s an ongoing investigation,” Cavusoglu said.
“Saudis proposed to have a joint working group and we accepted that but this working group should be a result-oriented one.”
Cavusoglu added that Turkey has further evidence regarding Khashoggi’s killing which they have yet to share with the public and that details of his case will continue to be reported to the public until the investigation is complete.
A Turkish security source told Al Jazeera on Tuesday that CIA Director Gina Haspel has seen evidence of Khashoggi’s murder which proves that the operation was carried out on orders from the highest level of leadership in Saudi Arabia.
The source said that they expect Europe to take a position soon concerning Khashoggi’s murder, once European nations are provided with the evidence.