"I will invest. I’ve been asked to be ... on the board of one or two of your city projects – your Red Sea Project – and am delighted to accept," he told an investment conference in the capital Riyadh.

Saudi Arabia announced on Tuesday a $500 billion cross-border city development project on the Red Sea. The kingdom also plans tourism developments on a number of Red Seea islands.

(Reporting by Katie Paul, writing by Alexander Cornwell)