The Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud is set to undergo a back operation next week, Saudi Press Agency SPA quoted a Saudi Royal Court statement as saying on Sunday. The surgery mainly aims to repair several vertebrae in the king’s spine as part of his medical checkups, according to the statement. “The operation will take place, God willing, next week at King Abdulaziz Medical City for the National Guard in Riyadh,” it added.