The chief executives of three big banks have become the latest bosses to pull out of a conference in Saudi Arabia.

HSBC's John Flint, Tidjane Thiam of Credit Suisse and Bill Winters of Standard Chartered will not be attending the event in Riyadh.

Diane Greene, who runs Google's cloud division has also pulled out, as has JP Morgan's Jamie Dimon.

It follows tensions between the US and Saudi Arabia over the Saudi journalist Jamal Khashoggi's disappearance.

A critic of the government, Mr Khashoggi vanished on 2 October after visiting the Saudi consulate in Istanbul. Authorities there believe he was killed in the building by Saudi agents, an accusation that the Saudi authorities have dismissed as "lies".

BlackRock chief executive Larry Fink, Ford chairman Bill Ford and Uber boss Dara Khosrowshahi are among others who will now not be attending the Future Investment Initiative event in Riyadh.

A page with a list of confirmed speakers has been deleted from the website for the conference, which runs from 23 to 25 October.

Siemens and Ernst Young are among those still planning to attend the conference.

Britain and the US are also considering boycotting the event, while others distancing themselves include Sir Richard Branson, who has halted talks over a $1bn Saudi investment in Virgin space firms.