President Donald Trump has spoken to King Salman of Saudi Arabia, who denies any knowledge of what happened to a Saudi journalist who visited the Saudi Consulate in Istanbul and then disappeared and is feared dead.
Mr Trump tweeted: “Just spoke to the King of Saudi Arabia who denies any knowledge of whatever may have happened ‘to our Saudi Arabian citizen’.”
Mr Trump said the Saudis told him they are working closely with Turkey to find an answer.
The US and Saudis are close allies.
Earlier, reports in Turkey suggested the consulate at the centre of the mystery would be jointly examined by officials from Saudi Arabia and Turkey.