A federal judge on Wednesday ordered the Trump administration to stop deploying California National Guard troops in Los Angeles and return command of the force to the state.

U.S. District Judge Charles Breyer in San Francisco granted a preliminary injunction sought by California officials, who argued President Donald Trump overstepped his authority by using Guard troops without the governor’s approval to bolster federal immigration enforcement. Breyer, however, stayed his ruling until Monday.

State officials said conditions in Los Angeles had shifted since Trump seized control of the Guard and deployed troops in June. The initial call-up of more than 4,000 service members had dwindled to several hundred by late October, with roughly 100 still stationed in the Los Angeles area.

The administration extended the deployment through February and also sought to use California Guard members in Portland, Oregon, as part of a broader effort to send federal forces into Democratic-led cities over the objections of state and local leaders.

Justice Department lawyers argued the Guard was still needed in Los Angeles to help protect federal personnel and property. The White House did not immediately respond to a request for comment.

Trump assumed command of the California Guard following protests over his intensified immigration enforcement policies. It was the first time in decades a president activated a state’s Guard without a governor’s request, marking a significant escalation in the administration’s efforts to carry out mass deportations. Guard members were posted outside a federal detention center in downtown Los Angeles and later used to protect immigration officers during arrests.

California sued, and Breyer issued a temporary restraining order requiring the administration to relinquish control, but an appeals court put that order on hold. State officials contended Trump was using Guard troops as a personal domestic police force in violation of federal restrictions on military involvement in civilian affairs.

The administration countered that courts could not second-guess the president’s determination that protest-related violence amounted to a rebellion, making it necessary to deploy the Guard.

In September, after a trial, Breyer ruled the deployment unlawful. Other courts have similarly blocked the administration’s attempts to send National Guard troops to Portland and Chicago.

This is a breaking news story. Updates to follow. 

This article includes reporting by the Associated Press.