dubai saudi arabian investment firm kingdom hold 4280.se say sunday support country government billionaire chairman prince alwaleed bin talal detain overnight prince alwaleed one country high profile businessmen one several princes minister former minister detain part anti-corruption crackdown two senior saudi officials tell reuters sunday kingdom hold chief executive list website talal ibrahim al-maiman receive support government would continue operate business usual investment firm say stock market statement prince alwaleed nephew king salman grandson saudi arabia founder king abdulaziz al-saud hold stake many major international company include citigroup twitter twtr.n ride-hailing firm lyft time warner twx.n early kingdom hold report swing third quarter profit restate year ago period loss saudi 's kingdom hold say support government chairman detain