Saudi Arabia said on Friday that Mr Khashoggi was killed at its Istanbul consulate after a fight broke out.
The disappearance of Khashoggi has provoked global criticism of Saudi Arabia's de-facto ruler, Crown Prince Mohammed bin Salman, and convulsed the kingdom as it struggles to respond to increasing worldwide pressure to explain the journalist's fate. A Saudi official said that General Assiri had organised the operation and that al-Qahtani had known about it and contributed to an aggressive environment that allowed it to escalate.
None of the New Zealand officials will attend the so-called "Davos in the Desert" investment summit in Riyadh due to the circumstances of journalist Jamal Khashoggi's death, Trade Minister David Parker said in a statement.
Speaking to USA broadcaster Fox, Foreign Minister Jubeir on Sunday extended condolences to members of the journalist's family.
Turkish pro-government newspaper Yeni Safak has published what it said were details from the audio, including that his torturers severed Mr Khashoggi's fingers during an interrogation and later beheaded and dismembered him.
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"I don't think it's credible", Brexit Secretary Dominic Raab told the BBC, adding there was a "serious question mark over the account that has been given".
Saudi state-run media is reporting that prosecutors in the kingdom believe Saudi writer Jamal Khashoggi was killed in the Saudi Consulate in Istanbul in a quarrel.
Saudi Arabia has arrested 18 people whom they claim are connected with the incident.
The state-run Saudi Press Agency made the announcement early Saturday.
In response to the comments by the Kentucky senator, Mr Jubeir said he finds it "very surprising that somebody 6,000 miles away can be certain about an event that happened 6,000 miles away with no access to information or intelligence".
The kingdom's weeks of denial and lack of credible evidence in the face of allegations that Khashoggi had been killed have shaken global confidence in ties with the world's top oil exporter.
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"If Khashoggi was fighting inside the Saudi consulate in Istanbul, he was fighting for his life with people sent to capture or kill him", said Mr Schiff, the ranking member of the House Intelligence Committee.
"Obviously, if he's gone forth and murdered this journalist, he's now crossed the line, and there has to be a punishment and a price paid for that", the Senate Foreign Relations chairman said Sunday on CNN's "State of the Union".
The Saudi official said the local cooperator is an Istanbul resident but would not reveal his nationality.
The front pages of Saudi newspapers on Sunday were branded with headlines of support for the kingdom's government.
However, he has pushed back again any effort to cancel the mega Dollars 110 billion arms deal with Saudi Arabia asserting that such a move will hurt U.S. economy and jobs.
He said on Thursday he believes Mr Khashoggi is dead and that the USA response to Saudi Arabia will likely be "very severe" but that he wanted to get to the bottom of what happened.
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