New Delhi, July 14 -- LONDON - Four ambulances belonging to a Jewish volunteer charity burned in a north London street in March before anyone invoked the words "state threats powers." On Monday, the British government cited those fires as it moved to designate Iran's Islamic Revolutionary Guard Corps as a terrorist organization, placing Tehran's official military institution in the same legal category as the Islamic State and al-Qaeda.

the IRGC; the Islamic Movement of Companions of the Right, or IMCR, an Iran-backed group that British authorities say directed seven attacks on Jewish institutions in the United Kingdom; and Russia's GRU Volunteer Corps, which European governments simultaneously sanctioned that Monday in a coordinated acti...