The United Kingdom designated the Islamic Revolutionary Guard Corps a terrorist group on Monday after it accused the proxy group of being behind a string of attacks on Jewish centers on behalf of Iran.

The U.K. had been an outlier in the Western world after the European Union designated the group a terrorist organization following Tehran’s massacre of protesters in January, but finally joined after accusing a new terrorist group — Islamic Movement of the Companions of the Right, also known as Harakat Ashab al-Yamin al-Islamiya — of carrying out arson, vandalism, and stabbing attacks against Jewish centers. The proscription makes it a criminal offense to be a member of the Guard, attend its meetings, or display its logo in public.