The Istanbul Chief Prosecutor's Office has said that the raid on a villa in Turkey's northwestern province of Yalova was based on information pointing that one of the Khashoggi murderers contacted a Saudi businessperson residing there.
Turkish forensic officers conduct a search at a villa in the village of Samanli in Yalova's Termal district, Turkey, Nov. 26, 2018. His remains have not yet been located.
Turkish President Recep Tayyip Erdogan has demanded greater cooperation from Saudi authorities in the case, alleging the killing had been orchestrated by the "highest levels" of Saudi government.
Turkish officials have said a 15-member assassination squad sent from Riyadh strangled and dismembered Khashoggi. The official, speaking on condition of anonymity, said biological evidence discovered in the diplomatic mission garden supports the theory that Khashoggi's body was disposed of close to where he was killed and dismembered.
The Saudi agents who have been blamed for the killing included some members of the crown prince's security entourage.
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Turkey says he was killed by a 15-member Saudi hit-squad and that his body was dismembered before being removed from the consulate.
Officials told Reuters last month that Khashoggi's killers may have dumped his remains at a rural location near Yalova, which is a 90-km (55 mile) drive southeast of Istanbul.
Police previously searched areas in Yalova as well as around Istanbul, including the Saudi Consulate, the nearby residence of the Saudi consul general and a forest on the outskirts of the city. The prince has been touring Arab countries and presenting a calm front despite worldwide criticism sparked by Khashoggi's murder.
Saudi Arabia initially said Khashoggi walked out of the consulate before shifting its account of what happened amid Turkish intelligence leaks.
The fallout from Khashoggi's death has put substantial pressure on crown prince Mohammed bin Salman, the country's ruler, who has mounted a widespread and expensive public relations campaign in the West to portray himself as a moderate reformer.