Saudi Authorities Widen Security Crackdown After Detaining Two Rivals to Crown Prince

DUBAI—Saudi Arabian Crown Prince Mohammed bin Salman has embarked on a broad security crackdown by rounding up royal rivals, government officials and military officers in an effort to quash potential challenges to his power, Saudi royals and advisers familiar with the matter said Saturday.

Members of the Saudi royal court have told allies that they detained two princes and their supporters because they were plotting a palace coup largely aimed at arresting the rise of Prince Mohammed, these people said.

…