Federal immigration enforcement agents swept through MacArthur Park in the Westlake District of Los Angeles on Monday morning, prompting a surprise appearance by the mayor.

Dozens of federal officers in tactical gear and about 90 members of the California National Guard were deployed for about an hour Monday to a mostly empty park in a Los Angeles neighborhood with a large immigrant population.

Los Angeles Mayor Karen Bass is condemning the presence of federal agents and National Guard troops who descended on MacArthur Park July 7.