The Turkish government has so far declined to elaborate on the alleged audio recordings, but on Wednesday, the Washington Post reported that CIA Director Gina Haspel had listened to them.
Khashoggi entered the Saudi consulate in Turkey's Istanbul on October 2 to obtain documentation for his upcoming marriage, but he never left the place. Saudi Arabia's financial clout among the Arab media has given it an influential tool as it grapples with the worldwide outcry first over the disappearance and later the death of Saudi writer Jamal Khashoggi.
Haspel traveled to Turkey on Monday to review intelligence regarding the incident. He was there to pick up marriage papers, with his fiancée waiting outside in their auto.
This image taken on October 23, 2018 shows Saudi Crown Prince Mohammed bin Salman shaking hands with Jamal Khashoggi's son in Riyadh on October 23, 2018.
Amid the ongoing furor over Khashoggi's death, Saudi King Salman has sacked the deputy head of the Saudi intelligence agency - and a top aide - while also ordering the arrest of 18 suspects in the case.
Turkey said it believed a hit squad of Saudi nationals had travelled to Istanbul with the sole objective of killing Khashoggi, a former member of the Saudi elite who became critical of the current government's administration in his country.
Meanwhile, world leaders continue to urge the Saudi authorities to clarify the circumstances of the journalist's killing. Speaking at an investment forum he was hosting in Riyadh, the crown prince called the killing a "heinous crime" but offered no new information on what happened.
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Saudi officials did not respond to requests for comment, but Whitson said that they were apparently allowed to leave after a travel ban on Salah was lifted.
French President Emmanuel Macron and British Prime Minister Theresa May both spoke via telephone with King Salman, according to a statement issued by the Saudi Foreign Ministry late Thursday, hours after the European Parliament's resolution passed.
Turkish media have also published a security camera image allegedly showing a vehicle belonging to the Saudi Consulate "scouting" a forest in the outskirts of Istanbul before Khashoggi was killed.
"Whether or not they acted in the name of the state, that remains to be discussed and investigated", she said.
"But we have enough right now to determine that the government of Saudi Arabia is responsible and is implicated".
Salah Jamal Khashoggi and his uncle Sahl bin Ahmed Khashoggi were received Tuesday by Saudi King Salman and Crown Prince Mohammed bin Salman, who expressed their condolences over the killing of the dissident journalist.