Local newspaper Hurriyet said the mansion belonged to a Saudi businessman and that a second property adjacent to it was also being searched
Jamal Khashoggi
Khashoggi, 59, had attended the consulate to deal with the paperwork for his impending marriage.
Irfan Fidan, chief prosecutor for Istanbul who heads the investigation into Khashoggi, ordered the search of the mansion, some 60 miles from Istanbul.
Local newspaper Hurriyet said the mansion belonged to a Saudi businessman and that a second property adjacent to it was also being searched.
Khashoggi's disappearance has heightened tensions between Turkey and Saudi Arabia.
The Saudi authorities have arrested 18 persons over Khashoggi's killing and brought criminal charges against 11 of them.
Five of those arrested could face execution, authorities said.
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