Turkish media close to the president published images on Wednesday of what it described as a 15-member "assassination squad" allegedly sent to target Saudi journalist Jamal Khashoggi, and of a black van later traveling from the Saudi consulate, where he went missing, to the consul's home.
One of the first images from the CCTV footage shared by 24 TV broadcaster on Wednesday showed a man believed to be Khashoggi enter the consulate at 1.14pm (5.14pm in Thailand).
The Saudi government has refuted those allegations, saying that Khashoggi left the consulate shortly after he entered.
A senior Turkish official told the Times that "Ankara hoped that Washington and the global community would take the lead in challenging Saudi Arabia".
Istanbul police experts were analyzing vehicles that entered and left the consulate, some of which were then seen on camera on October 2 at the consul-general's residence, 200 meters away, the report said.
Officials also say they had become aware that Khashoggi may have been kidnapped before the second plane had departed, and monitored seven Saudis in a waiting room as they checked their luggage for a second time.
The surveillance image bore a date and time stamp, as well as a Turkish caption bearing Mr. Khashoggi's name and that he was arriving at the consulate. The authorities in Istanbul believe he was murdered by Saudi agents. Suggestions that Khashoggi was killed and his body then mutilated have gained wide circulation in the week since he vanished, and Turkish officials continue to insist he met a brutal fate when he stepped through the doors of the diplomatic mission.
Trump on Monday expressed concern about Khashoggi's case and Secretary of State Mike Pompeo called for a thorough investigation.
Turkey's private NTV news channel identified one member of the alleged 15-member team as the head of a Saudi forensic science agency.
The Washington Post also reports that prior to Mr Khashoggi's visit, U.S. intelligence had intercepted communications of Saudi officials discussing a plot to capture him.
The search will take place as part of the official investigation, which was being conducted "in an intense manner", he said without giving any date.
In an off-the-record interview published by the BBC, Khashoggi said he didn't think he'd be able to go back to Saudi Arabia, but still called Mohammad bin Salman's reforms a time of "great transformation" in his country.
Turkish Foreign Ministry spokesman Hami Aksoy said Tuesday that Saudi authorities have notified Ankara that they were "open to cooperation" and would allow the consulate building to be searched.