Barcelona is on alert after the US State Department warned of the risk of a terrorist attack in Spain’s second-largest city during the Christmas holidays.

The US State Department’s Bureau of Consular Affairs tweeted: “Exercise heightened caution around areas of vehicle movement, including buses, in the Las Ramblas area of Barcelona during Christmas and New Year’s.”

“Terrorists may attack with little or no warning, targeting tourist locations, transportation hubs, and other public areas.”

-Noah Harte