Saudi media showed Salah Khashoggi meeting Tuesday with the crown prince, who reportedly expressed his condolences.
Later, Saudi officials said he had been accidentally killed during a "fistfight". "Many are trying to take advantage of this painful incident to divide the two [Turkey and Saudi Arabia], but they won't be able to do so".
The announcement underscored the rapidly mounting pressures on Saudi Arabia to fully illuminate Khashoggi's killing, after its previous explanations were contradicted by Turkey and met with skepticism by the United States, a close Saudi ally.
Turkish authorities maintain that Khashoggi was tortured, killed and dismembered in a premeditated operation organized by Saudi government officials.
From the time he vanished into the kingdom's consulate in Istanbul, Riyadh's allied newspapers and TV stations across the region echoed the Saudi denial of any knowledge of his fate or weaved alternative scenarios of an alleged plot by rivals Qatar and Turkey to destabilize the kingdom.
However, Trump also said that he wanted to believe that rogue operatives were behind the Khashoggi killing.
Trump described the plan to kill Khashoggi in the Saudi diplomatic mission in Istanbul, as well as the contrasting cover-up stories after it, as a "bad deal" and "the worst cover-up ever".
Activists protesting the killing of Saudi journalist Jamal Khashoggi hold a candlelight vigil outside Saudi Arabia's consulate in Istanbul
The spy chief on Thursday briefed President Donald Trump on Turkey's findings and her discussions, White House spokeswoman Sarah Sanders said.
The Foreign Ministry did not say what led the Saudi prosecutor to draw that conclusion, only that it was based on information shared by Turkish investigators working with Saudi officials in Turkey.
She said: "Good news for a change: confirming that Jamal Khashoggi's son Salah and his family are finally out of Riyadh and on their way to the U.S., travel ban lifted".
This image taken on October 23, 2018 shows Saudi Crown Prince Mohammed bin Salman shaking hands with Jamal Khashoggi's son in Riyadh on October 23, 2018. The resolution came several days after Germany became the first Western government to suspend arms sales to Saudi Arabia, the world's largest arms importer.
The people outside the consulate, some of whom had travelled from other countries for the vigil, lit candles in front of posters of Khashoggi.
After the journalist disappeared, Saudi Arabia initially insisted Khashoggi had walked out of the consulate after visiting the building.
"We will continue to demand that all authorities across the Middle East immediately release all opinion leaders and political prisoners".
Italy brushes off downgrade as it plans EU budget response
The Italian government sent to the European Commission a draft budget for 2019 is set the deficit at 2.4%. Italy projects this will widen by 0.8 per cent, more than the 0.6 per cent improvement Brussels wants.