Saudi Arabia’s future king has tightened his grip on power through an anti-corruption purge by arresting royals, ministers and investors including billionaire Alwaleed bin Talal who is one of the kingdom’s most prominent businessmen. FILE PHOTO – Saudi Crown Prince Mohammed bin Salman attends the Future Investment Initiative conference in Riyadh, Saudi Arabia October 24, 2017. REUTERS/Hamad I Mohammed Prince Alwaleed, a nephew of the king and owner of investment firm Kingdom Holding 4280.SE, invests in firms such as Citigroup ( C.N ) and Twitter ( TWTR.N ). He was among 11 princes, four ministers and tens of former ministers detained, three senior officials told Reuters on Sunday. The purge against the kingdom’s political and business elite also targeted the head of the National Guard Prince Miteb bin Abdullah who was detained and replaced as minister of the powerful National Guard by Prince Khaled bin Ayyaf. […]