Media companies are pulling out of a Saudi investment conference because of growing outrage over the disappearance of a prominent Saudi journalist in Turkey.

Economist Editor-In-Chief Zanny Minton Beddoes will not participate in the Future Investment Initiative conference in Riyadh, spokeswoman Lauren Hackett said in an email.

Andrew Ross Sorkin, a CNBC anchor and New York Times business journalist, tweeted that he was not attending the conference, saying he was "terribly distressed by the disappearance of journalist Jamal Khashoggi and reports of his murder."

Andrew Ross Sorkin tweet

Pressure has mounted on Saudi Arabia since Khashoggi, a critic of Saudi policies, went missing. He was last seen entering the Saudi consulate in Istanbul on Oct. 2.

The New York Times has also decided to pull out of the event as a media sponsor, spokeswoman Eileen Murphy said.

The Financial Times said in a statement that it was reviewing its involvement as a media partner.

Uber Technologies Chief Executive Officer Dara Khosrowshahi said in a statement he won't attend the FII conference in Riyadh unless substantially different set of facts emerge.