Trump blames 'rogue killers' over Khashoggi

But no one in Washington, D.C., has ever been at a cocktail party with a starving Yemeni child, and so Riyadh's offenses against such children did not threaten the U.S. -Saudi alliance.

Turkish officials say they fear a team of Saudi agents killed and dismembered Mr Khashoggi, and they have released surveillance footage of the alleged perpetrators and mysterious movements outside the consulate on October 2, the day he entered.

Turkish officials have accused Saudi Arabia of murdering the journalist in the building and removing his body.

Joe Lieberman, a former Democratic senator from CT who became an independent, said the disappearance and suspected murder of journalist Jamal Khashoggi are "troubling", but until facts are established, the United States shouldn't destroy its relationship with Saudi Arabia.

"The Kingdom affirms its total rejection of any threats and attempts to undermine it, whether by threatening to impose economic sanctions, using political pressures, or repeating false accusations", the official SPA news agency quoted an official source as saying.

The government critic vanished on 2 October after visiting the Saudi consulate in Istanbul, Turkey.

Saudi Arabia has denied the claims.

Trump tweeted early Monday that Salman denied any knowledge of "whatever may have happened 'to our Saudi Arabian citizen'".

King Salman and Turkish President Recep Tayyip Erdogan spoke by telephone on Sunday evening, officials said, and stressed the importance of the two countries working together on the case.

"Saudi Arabia has also suggested reducing its investments in the USA economy, which is now evaluated at $800 billion (€690 billion)", Meyer added.

"The king firmly denied any knowledge of it", Trump told reporters after speaking with King Salman. Germany, Britain and France issued a joint statement over the weekend expressing "grave concern" and calling for a credible investigation to ensure those responsible for the disappearance "are held to account".

The New York Times, citing a person familiar with the Saudi plans, reported the crown prince had approved an interrogation or rendition of Khashoggi back to Saudi Arabia.

Trump has said he probably will not cancel a $110 billion arms deal with the Saudi government because that could unnecessarily harm the U.S.

"It has been 13 days since the event, so surely proving some of the evidence might be hard, but we believe we will obtain evidence", the Turkish official said.

Media reports say Khashoggi may have recorded his own death on his Apple Watch.

Britain and the United States are also considering boycotting the conference, the BBC has learned.

Turkey's investigation into the disappearance of Khashoggi has reportedly revealed recordings made on his Apple Watch, which synced with his iPhone being carried outside the consulate by Khashoggi's fiancée.

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