Speaking at a news conference in Berlin, government spokesman Steffen Seibert reiterated Germany's expectation from Saudi Arabia for a credible, transparent and thorough investigation.
For Saudi Arabia's allies, the burning question has been whether they believe that Prince Mohammed, who has painted himself as a reformer, has any culpability in the killing, a possibility raised by several U.S. lawmakers. The US, Britain and others have described the explanation as not credible and demanded answers backed up by facts.
Saudi Arabia must relinquish control of the investigation into the "political" murder to an independent and unbiased Turkish operation in Istanbul, Erdoğan said.
President Trump, who has made Saudi Arabia a central pillar of his Middle East strategy, has grown increasingly skeptical of the kingdom's claim that Khashoggi's death was a "rogue operation" that occurred after a fistfight broke out in the Saudi Consulate in Istanbul on October 2.
After blanket denials of knowledge of his disappearance, Saudi officials acknowledged over the weekend that Khashoggi had been killed by "rogue" agents inside the Saudi consulate in Istanbul.
"Saudi Arabia has taken an important step by admitting the murder".
There were conflicting reports Thursday about whether investigators had searched the well. Khashoggi was living in exile in the United States and had planned to move to Istanbul and marry his Turkish fiancee.
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British Prime Minister Theresa May said its Saudi arms sales were "under review", a stance similar to that expressed by Australia. Earlier, the U.S. leader denounced Khashoggi's murder and its cover-up by the Saudi Arabia as a " total fiasco from day one ".
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Speaking at an investment conference in Riyadh on Wednesday, bin Salman described Khashoggi's killing as "a heinous crime that can not be justified".
Also yesterday, Turkey's Justice Minister Abdulhamit Gul said Turkish prosecutors could send a request for the extradition of the Saudi consul-general to Turkey, who left the country shortly after Khashoggi was killed.
On October 2, the day of the killing, operatives disabled CCTV cameras at the consulate, Mr Erdogan said. "If these individuals now have visas, those visas will be revoked today", May said while addressing lawmakers at a Parliament session on Wednesday.
"In terms of what we ultimately do, I'm going to leave it very much - in conjunction with me - up to Congress".
White House press secretary Sarah Sanders told CBS News on Thursday that Haspel would brief President Trump later in the day, following her short trip to Turkey, but Sanders would not comment on whether the Central Intelligence Agency chief had heard any audio depicting Khashoggi's killing.
A host of Western executives and governments have pulled out of a high-profile Saudi investment summit that started on Tuesday because of the Khashoggi affair. Police have searched both areas for evidence of Khashoggi's remains, Reuters has reported.
Nine-members of the 15-person team that arrived in Turkey that day then panicked and arranged for a local Turkish "collaborator" to remove the body.
She said that Britain would be taking action against "all suspects" to prevent them from entering Britain, after the USA decision Tuesday to revoke the visas of the Saudi suspects. "Covering up this kind of savagery will hurt the conscience of all humanity", he said, per the Washington Post.