Prince Talal bin Abdulaziz, a senior member of the Saudi royal family who supported women’s rights and once led a group of dissident princes, died on Saturday. He was 87.

His death was announced by his son Prince Abdulaziz bin Talal on Twitter, and confirmed in a statement on Prince Talal’s website. Neither statement specified where he died or what the cause was.

Prince Talal was an older brother of King Salman and the father of the billionaire businessman and investor Prince Alwaleed bin Talal. His father, King Abdulaziz, was the founder and first ruler of modern Saudi Arabia. His sons have ruled since his death in 1953, with the throne passing from brother to brother.