Prince Talal bin Abdulaziz, a vocal supporter of reform in Saudi Arabia, has died aged 87, the royal court said on Saturday.

Saudi Arabian billionaire Prince Alwaleed bin Talal, who was detained for three months in an anti-corruption campaign under Crown Prince Mohammed bin Salman, pledged support on Thursday for the young leader's program of sweeping reforms.

Saudi Prince Alwaleed bin Talal, the chairman of Kingdom Holding who spent nearly three months in detention in the kingdom’s anti-corruption campaign, told Bloomberg TV he had reached an agreement with the government for his release.

Saudi Arabian billionaire Prince Alwaleed bin Talal has been released from detention, family sources said on Saturday, more than two months after he was taken into custody in the kingdom’s sweeping crackdown on corruption.

Saudi Arabian billionaire Prince Alwaleed bin Talal said on Saturday that he expected to be cleared of any wrongdoing and be released from custody within days.

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.

Saudi Arabia has arrested dozens of senior figures including princes, ministers and a top business tycoon, with authorities on Sunday pledging "fair" justice after a sweeping purge seen as consolidating the crown prince's hold on power.