An official delegation from Saudi Arabia has arrived in Turkey where the government is demanding an explanation about the disappearance of a US-based journalist.
Jamal Khashoggi hasn't been seen since he entered the Saudi consulate in Istanbul, and Turkish officials say they have evidence suggesting he was murdered there by a Saudi hit squad.
Our reporter Simon Marks is in Istanbul.
IN: "The Saudi delegation…."
OUT: "…base in Washington"
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