U.S. Embassy In London Warns Americans Near Jewish Sites In Europe

The U.S. Embassy in London on April 25, 2026 warned Americans to "exercise increased caution" near Jewish sites in the United Kingdom and across Europe after a series of recent attacks.

The advisory told U.S. citizens to be vigilant around synagogues, Jewish community centers and other Jewish sites and to stay aware of their surroundings. British and European authorities have increased security at Jewish sites while investigating a string of attacks that raised concerns about threats to Americans and Jewish communities.

The episode traces back to a U.S.- and Israeli-led campaign on February 28, 2026, called Operation Epic Fury, which struck Iranian military and government targets. In retaliation, Iran activated proxy networks in Europe that began carrying out attacks in early March. Those incidents included an explosion at a Rotterdam synagogue on March 13 and a blast at a Jewish school in Amsterdam on March 14. They also included arson attacks on Hatzola ambulances in London on March 23 and a fire at Kenton United Synagogue on April 18. European investigators see a pattern of hybrid warfare using hired operatives and front groups such as HAYI to claim responsibility.

Early reports treated the attacks as isolated incidents, but later coverage and official probes connected them to broader Iran-linked retaliation, prompting governments to widen travel warnings. Online commentators cataloged attacks on Jewish and U.S. targets in multiple countries, and Israel issued advice urging citizens to avoid synagogues outside Israel as threats mounted.