Turkey's president wants the suspects to be tried in his country.
Recep Tayyip Erdogan rejected Saudi Arabia's version of what happened to Jamal Khashoggi and called it a premeditated, political murder.
And Erdogan wants all involved, from top to bottom, to face punishment.
The Saudi king and Crown Prince Mohammed bin Salman offered condolences to Salah the son of Jamal Khashoggi, the kingdom announced early Monday.
A friend of the Khashoggi family told The Associated Press that Salah has been under a travel ban since his father began writing critically about the prince in columns for The Washington Post. The individual spoke on condition of anonymity, fearing reprisal.
Al Jazeera's Zeina Khodr reports from Istanbul.
