US government officials have not been invited to a Saudi investment conference planned for later this month, its organiser told AFP onMonday, saying he did not want the gathering “to become a political platform”. The decision not to invite American officials, a departure from previous years, comes as tensions rise between longtime partners Washington and Riyadh over the Saudi-led OPEC+ cartel’s recent vote to cut oil production by up to two million barrels per day from November. The Future Investment Initiative (FII), a three-day conference set to begin on 25 October in Riyadh, typically draws…