
“…masked guards with the royal court on Friday arrested [78 year old] Prince Ahmed bin Abdulaziz, a younger brother of [84 year old] King Salman, and Prince Mohammed bin Nayef, the king’s nephew and a former crown prince [and “a former army head of intelligence”]. The guards also detained a brother of Mohammed bin Nayef.”
“…on Saturday … the sweep broadened to include dozens of interior ministry officials, senior army officers and others suspected of supporting a coup attempt.”
This article goes on to outline the background of MBS consolidating power over the last few years.