The Anadolu Agency has reported that employees from the Saudi Consulate in Istanbul have started giving testimony on Khashoggi’s disappearance at the prosecutor's office.
Fifteen staff members, all Turkish nationals, have been giving statements, according to NTV.
Local media earlier reported that Ankara had an audio recording of the alleged murder of Khashoggi at the Saudi Consulate in Istanbul, though the Saudi officials have denied any involvement in the case.
He was last seen entering the Saudi Consulate General in Istanbul where he went to receive papers he needed to remarry. Turkey has expressed concern that Khashoggi could have been murdered inside the building, while the Saudi government has denied involvement in the case, claiming that the journalist disappeared after he left the consulate.