Foreign secretary Jeremy Hunt and his G7 counterparts have said they are "very troubled" by the disappearance of a Saudi journalist and insisted that those responsible must be held to account.
The Washington Post columnist, Jamal Khashoggi, was critical of Saudi Crown Prince Mohammed bin Salman and was reportedly killed while visiting the Gulf kingdom's consulate in Istanbul to obtain a document confirming he had divorced his ex-wife, in order to allow him to remarry.
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Mr Khashoggi was living in self-imposed exile in the US and writing opinion pieces for the Washington Post before he vanished.
In a statement, G7 foreign ministers, including Jeremy Hunt, said: "We, the G7 foreign ministers, of Canada, France, Germany, Italy, Japan, the United Kingdom, the United States of America, and the High Representative of the European Union, affirm our commitment to defending freedom of expression and protection of a free press.
'We remain very troubled'
"We remain very troubled by the disappearance of prominent Saudi journalist Jamal Khashoggi.
"Those bearing responsibility for his disappearance must be held to account."
Turkish newspaper Yeni Safak detailed an alleged audio recording of the killing of Mr Khashoggi in an article.
It reported that Saudi Consul General Mohammed al-Otaibi was heard telling the alleged torturers to "do this outside; you're going to get me in trouble".
Turkish officials have said police searching the Saudi consulate have found evidence that Mr Khashoggi was killed there.
Mr Hunt has said that questions remain about the case that only Saudi Arabia can answer.