New Delhi, Sept. 3 -- A US federal judge on Tuesday blocked the Trump administration's use of military forces to tackle crime in California, as President Trump threatened to send troops to additional cities like Chicago.

Judge Charles Breyer, of the U.S. District Court in San Francisco, ruled that the administration had deliberately breached the Posse Comitatus Act, a law that limits military involvement in domestic law enforcement, by deploying troops to assist with crowd control and support immigration and drug enforcement actions, Reuters reported.

In June, the administration had sent 4,000 National Guard personnel and 700 active-duty US Marines to Los Angeles as part of its crackdown.

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