Former Shell chief executive and chairman of Swiss engineering firm ABB Peter Voser is the latest high-profile figure to distance himself from the advisory board of Saudi Arabia's $500bn £382.5bn) mega-city project NEOM.

The move follows the exit of a string of global business and political leaders from an upcoming investment conference in Riyadh. International ties to the region have been breaking down amid an ongoing investigation into the death of well-known Saudi critic Jamal Khashoggi.

A spokesperson for ABB told City A.M. that Voser had decided to suspend his participation on the board in light of the current circumstances, while ABB chief executive Ulrich Spiesshofer will also not attend the event.

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