Last month, a court in Saudi Arabia issued final verdicts convicting eight unnamed Saudi nationals in Khashoggi's 2018 killing.
The court ordered a maximum sentence of 20 years in prison for five, another received a 10-year sentence, and two others were ordered to serve seven years in prison.
Khashoggi -- a royal family insider turned critic -- was killed and dismembered at the kingdom's consulate in Istanbul in October 2018.
All suspects in the killing have left Turkey and Saudi Arabia has put 11 people on trial over the murder.
The news came hours after police confirmed that around 15 Saudis, including officials, arrived in Istanbul on two flights on Tuesday and were at the consulate at the same time as the journalist.