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.

The Department of Homeland Security wouldn’t say what the purpose of the operation was on Monday, why it ended abruptly, or whether anyone had been arrested.

Los Angeles Mayor Karen Bass is speaking out against the U.S. Immigration and Customs Enforcement agents who took over MacArthur Park where children were playing, calling the takeover attempt “absolutely outrageous,” USA Today reported. Video footage shows armored vehicles, officers ,and armed troops swarming a soccer field on a sunny July 7 day.

Community leaders suggested starting a $500,000 emergency relief fund for local businesses that are struggling to staff their stores and restaurants.

Agents on horseback and in armored vehicles participated in a daytime raid in the heart of Los Angeles' immigrant community.

Immigration raid in LA's Westlake neighborhood sparked controversy as Mayor Bass confronted Border Patrol agents, calling their presence "unacceptable" amid community outrage.

Dozens of federal officers in tactical gear roamed a mostly empty park in a Los Angeles neighborhood with a large immigrant population for about an hour before clearing out.

Federal agents conducted a federal immigration sweep at MacArthur Park in LA's Westlake District late Monday morning.

This pisses me off. She is scared for the kid’s safety … due to immigration officials at the park, but never scared for their safety when the park is filled with homeless,

Video shows armed federal agents, some on horses, walking across a soccer pitch. Mayor Bass said minutes before, more than 20 kids were playing on the field.