"Information has come from the Turkish side indicating that the suspects in the Khashoggi case embarked on their act with a premeditated intention", the prosecutor Saudi bin Abdullah said in a statement carried by the Saudi news agency SPA on October 25.
Erdoğan has said the three others in the group of 18 who have been detained in Saudi Arabia were consulate employees.
Khashoggi, a self-exiled, opposition Saudi journalist, was last seen on October 2 entering Saudi Arabia's consulate in Istanbul.
Turkey has since demanded the extradiction of the 18 officials accused of Khashoggi's murder.
Palladino said that US Secretary of State Mike Pompeo had discussed Jamal Khashoggi's son during his recent visit to Riyadh and "made it clear" to Saudi leaders that Washington wanted him free to leave the kingdom.
"Failure of any nation to adhere to global norms and the rule of law undermines regional stability at a time when it is needed most", he added.
"And what we say to people is wait until everything is done, then reflect on the results of the investigation, and then make a determination on whether this investigation was serious or not".
After initially claiming that the journalist left the consulate, Saudi prosecutors said Thursday that Turkish evidence shows the slaying of journalist Jamal Khashoggi was premeditated.
Macron also said that if Saudi Arabia is to be sanctioned, "we must do so across the board".
Hatice Cengiz, who is Turkish, said she would never have planned to marry the journalist had she known it would lead to his death.
Saudi journalist Jamal Khashoggi was the victim of an "extrajudicial execution" committed by the Saudi state, a United Nations expert said Thursday, calling for an worldwide investigation. Turkish media have published conflicting reports saying officials may be focusing on a well in the garden of the Saudi diplomatic compound.
That could change after his briefing with Haspel, however, who is back in Washington after a trip to Turkey where she was briefed on Turkey's own investigation.
Mattis, speaking to an worldwide security conference on Saturday, never mentioned Saudi Arabia directly in connection with the October 2 killing of Khashoggi, a Virginia resident who was a columnist for The Washington Post, at the Saudi Consulate in Istanbul, reports The New York Times. All four of Khashoggi's children are now in the U.S.
"The case of journalist Khashoggi is, of course, something incredible, I told the Saudi king yesterday in our telephone conversation", Merkel said at a press conference with Czech prime minister Andrej Babis.