Amnesty International condemned ` ` outrageous restriction '' of peaceful protests . Thousands were arrested last week . Saudi Arabia 's Interior Ministry warned Saturday that its security forces will be `` authorized to take all measures against anyone who tries to break the law and cause disorder , '' the ministry said , according to the country 's state-run news agency . ` ` Prolonged detention '' without trial denounced .
Amnesty International condemned ` ` outrageous restriction '' of peaceful protests . Thousands were arrested last week . ` ` Prolonged detention '' without trial denounced .