In the days before protests erupted in Los Angeles, the Trump administration stepped up its efforts to detain migrants — taking into custody those who arrived for routine check-ins while also conducting workplace raids that have sent waves of fear across Southern California and beyond.

Several people were detained in an immigration operation at the Santa Fe Springs Swap Meet this weekend, according to swap meet officials. Video from the scene at 13963 Alondra Blvd. showed masked federal agents apprehending several people on Saturday, accompanied by armed U.S. Marines. It was unclear what further actions were taken.

Mayor Karen Bass and legislators oppose Trump's planned immigration raids and military presence in Los Angeles.

Dozens of mayors from across the Los Angeles region banded together to demand that the Trump administration stop the stepped-up immigration raids that have spread fear across their cities and sparked protests across the U.

President Trump has said the city would be burning without military intervention, but the protests have been confined to a relatively small area.

The House Oversight Committee is investigating the protests in Los Angeles, sending letters to the top Democratic officials involved in the response.

Over the years, Trump has threatened to intercede in the state’s long-running homeless crisis, vowed to withhold federal wildfire aid as political leverage in a dispute over water rights, called on police to shoot people robbing stores and warned residents “your children are in danger” because of illegal immigration.