Within days of the mysterious disappearance Turkish officials had made anonymous leaks to the media about the killing of the journalist, a harsh critic of Saudi Crown Prince Mohammed bin Salman.
The U.S.is urging Saudi Arabia to locate Khashoggi's body and return it to his family as soon as possible.
Khashoggi vanished after entering the consulate on October 2 to obtain paperwork for his marriage to his Turkish fiancee Hatice Cengiz. "This is what is understood from the prosecutor's statement".
Khashoggi disappeared shortly after entering the consulate October 2 to obtain documents for his planned marriage, with Saudi officials giving shifting explanations for his death.
Saudi Arabia has faced a torrent of global condemnation over the killing of the royal insider-turned-critic.
Ankara has repeatedly called for the suspects - who have been arrested in Saudi Arabia - to be extradited for trial in Turkey, something that Riyadh has rejected.
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Aktay's statement comes after the first official acknowledgement from the Istanbul chief prosecutor, Irfan Fidan, on Wednesday that Khashoggi's body was "dismembered and destroyed" after his death at the hands of a team of Saudi officials who flew in from Riyadh to kill him.
He said France was not "dependent on our economic relations with Saudi Arabia" and the country would impose sanctions, but no details were given. However, as global pressure increased, Riyadh admitted that the killing was an error, carried out by rogue elements.
"Likewise, the refusal of the Saudi public prosecutor - who recently visited his counterpart in Istanbul - to cooperate with the investigation and answer even simple questions is very frustrating".
Saudi Arabia faces sharp criticism from the worldwide community in the wake of the death.
She has previously said she was "extremely disappointed" with the response of various countries' leadership to the killing, especially that of the US.
"It'll take us probably a handful more weeks before we have enough evidence to actually put those sanctions in place, but I think we'll be able to get there", he said, adding that President Donald Trump had vowed accountability for all involved in the "heinous crime".
Erdogan said there was more to Khashoggi's death than just action by "a group of security officials", he said. "We have to resolve our issues by our own will".
The delegation included Michael Little, former head of CBN; the current and former presidents of National Religious Broadcasters, Jerry Johnson and Wayne Pederson; and Larry Ross, founder of A. Larry Ross Communications.