Federal agents and military personnel flooded Los Angeles's MacArthur Park on Monday, prompting swift backlash from protesters and a public rebuke from Mayor Karen Bass.Border Patrol agents on horseback joined the immigration crackdown in the sanctuary city,

Residents were outraged after dozens of federal agents marched through MacArthur Park, in one of the city’s most immigrant-heavy neighborhoods. Homeland Security officials said it was an immigration enforcement operation.

A chaotic scene unfolded Monday morning when a large number of armed federal agents descended on Los Angeles’ MacArthur Park before leaving in armored vehicles, SUVs and vans. Details about why the agents in tactical gear were at the park at about 11 a.