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.

The most recent crackdown breaks with the tradition of consensus within the ruling family, wrote James Dorsey, a senior fellow at Singapore’s S. Rajaratnam School of International Studies.

“Prince Mohammed, rather than forging alliances, is extending his iron grip to the ruling family, the military, and the National Guard to counter what appears to be more widespread opposition within the family as well as the military to his reforms and the Yemen war,” he said.