LONDON (VINnews) — The U.S. Embassy in London has issued a security alert urging Americans in Britain to exercise increased caution following a series of suspected arson attacks targeting Jewish institutions and other sites in the United Kingdom.

The advisory urged U.S. citizens to remain aware of their surroundings, particularly when visiting Jewish houses of worship, community centers and sites linked to American interests.

The warning follows several recent incidents, including a fire that damaged Hatzalah ambulances near Machzike Hadath Synagogue in London’s Golders Green neighborhood, as well as attempted firebombings at synagogues and other locations.

Authorities have also been investigating incidents involving suspicious devices or incendiary materials near Jewish and Israeli-linked sites, though some devices reportedly failed to fully ignite or caused only limited damage.

A group believed by some analysts to have ties to Iranian interests has claimed responsibility for some threats, though officials have not publicly confirmed responsibility for the attacks.

The alert comes amid heightened concern in Britain’s Jewish community over security at religious institutions. British authorities have increased patrols in some affected areas as investigations continue.