A federal judge in Los Angeles ordered the Trump administration to stop carrying out immigration sweeps in which she said federal agents have been indiscriminately arresting people across southern California without reasonable suspicion that they’re in the country illegally.

Since early June, agents from Immigration and Customs Enforcement, the Border Patrol and other federal agencies have been roving Los Angeles and surrounding counties arresting thousands of people in what civil rights lawyers characterized in a lawsuit last week as an unconstitutional and “extraordinary campaign of targeting people based on nothing more than the color of their skin.”

In her order, Judge Maame Ewusi-Mensah Frimpong, of the U.S. District Court for the Central District of California, said there is “a mountain of evidence” to support the claim that agents are arresting people solely based on their race, accents, or the work they’re engaged in, in violation of the Fourth Amendment’s protection against unreasonable government seizure.