Separately, the SPA also reported that Crown Prince Mohammed bin Salman bin Abdulaziz made a telephone call to Mr Salah Khashoggi, in which the prince expressed his condolences to Salah and his family on the death.
"For decades we used our oil policy as a responsible economic tool and isolated it from politics", Energy Minister Khalid Al-Falih said in an interview with Russia's TASS news agency published on Monday.
Turkish police believe The Washington Post columnist was murdered and dismembered shortly after he entered the Saudi consulate in Istanbul on October 2; Turkish media have reported that a 15-man hit team was sent from Riyadh specifically for the assignment.
A senior Turkish official quoted by CNN said that the Saudi was "brought to Istanbul to act as a body double" for Khashoggi, adding: "This was a premeditated murder and the body was moved out of the consulate".
Saudi Arabia's explanation that Khashoggi was killed in a "fistfight" and 18 Saudis have been detained has been met with worldwide skepticism and allegations of a cover-up created to absolve Prince Mohammed of direct responsibility.
Turkey earlier said 15 Saudis who travelled to Istanbul were involved in Khashoggi's disappearance. Germany has also said it will halt arms exports to the Kingdom so long as the uncertainty over the fate of Khashoggi persists.
It said the investigations had "revealed that the discussions that took place between [Khashoggi] and the persons who met him.at the Saudi consulate in Istanbul led to a brawl and a fist fight".
"The horrid story of Jamal Khashoggi has sent many activists into a state of shock", said Amani al-Ahmadi, a 27-year-old Saudi exile in Seattle.
"I agree with all those who say that the, albeit already limited, arms exports can't take place in the situation we're now in", German chancellor Angela Merkel told press in Berlin on Sunday (21 October). The newspaper said the four calls went to Bader al-Asaker, the head of Prince Mohammed's office. He initially said he believed the Saudi account. He adds Saudi officials do not know the whereabouts of Khashoggi's remains.
Khashoggi, who would have been 60 this month, sought refuge in the United States after fleeing his native Saudi Arabia after the 2017 appointment of strongman Mohammed bin Salman as heir to the throne.
The kingdom's announcement comes two days after acknowledging that the Washington Post writer was killed October 2 at the consulate under disputed circumstances.
The UK, France and Germany said on Sunday that Saudi Arabia's version of Khashoggi's death needs to be supported by "facts" to be considered "credible". We don't know in terms of details how. "But I want to get to the answer", Trump told reporters this weekend when asked about the Saudi investigation and Riyadh's firing of officials.