(CNN) Two senior Saudi royals are among several members of the royal family arrested on Friday, two sources with knowledge of the arrests have said, confirming an apparent bid to consolidate Crown Prince Mohammed bin Salman's power.

The brother of Saudi Arabia's King Salman bin Abdulaziz Al-Saud and a former crown prince were among those detained, one Saudi source, who requested anonymity for fear of reprisal, said Sunday.

He told CNN that several senior royals were detained in the capital Riyadh on Friday, including Prince Ahmed bin Abdulaziz al Saud, a brother of Saudi King Salman, and Prince Mohammed bin Nayef bin Abdulaziz al Saud, the king's nephew who is known as MBN.

Prince Ahmed was arrested along with a security detail, the source said. The prince had been on vacation in Morocco, and was arrested two days after returning to the kingdom.

The newly arrested royals have been taken to the same detention facility as the former King's son Turki bin Abdullah, the source added.

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