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 fire bombings at synagogues and other locations.