"We are calling the entire world to put the necessary pressure, global pressure, on the Saudi government to find his remains, to be able to bury him, even before finding those who are responsible, before this issue is covered up", Faith Oke, executive director of the Turkey-Arab Media Association, said Thursday.
Saudi Prince Ahmed bin Abdulaziz Al-Saud, King Salman's brother and a critic of his nephew Crown Prince Mohammed bin Salman, has traveled back to Saudi Arabia, a source familiar with the prince's movement told CNN on Thursday.
Crown Prince Mohammed bin Salman made the allegation during a phone call with US President Trump's son-in-law Jared Kushner and another official, the Washington Post reports. The Saudi attorney general then acknowledged that Khashoggi was killed in a premeditated murder.
The Saudis have given a shifting account of what happened to Khashoggi on October 2.
Germany and Switzerland have vowed to halt arms sales to Saudi Arabia until the case is clarified.
Israeli officials confirmed the Post's report to the Ynet news site, saying Netanyahu urged officials in Washington not to allow the close relationship with the Saudi crown prince to be undermined by the incident.
Turkish President Recep Tayyip Erdogan has also called on Riyadh to disclose the identity of an alleged local collaborator said to have been involved in disposing of Khashoggi's body.
In a statement to the newspaper, Khashoggi's family denied he was a member of the Muslim Brotherhood and said the murdered writer had himself denied this repeatedly in recent years.
Some claimed the body was wrapped up in a rug to be transported from the scene, while others said the hit squad carried the dismembered corpse away in several bags.
He entered the consulate to sort out documents for his marriage to his Turkish fiancée, Hatice Cengiz.
UK Foreign Secretary Jeremy Hunt also said it was an appalling act, adding that it had "possibly" given the U.S. and the UK a chance to put new pressure on Saudi Arabia over other issues.
After Saudi Arabia admitted that Khashoggi was killed in its Istanbul consulate, five high-ranking officials were dismissed, including bin Salman's media chief and the deputy head of the Saudi intelligence service.