The downtown curfew encircles the downtown civic center, including City Hall, the main county criminal courthouse, LAPD headquarters and federal buildings.

Several U.S. cities braced for protests on Wednesday against President Donald Trump's sweeping immigration raids, as parts of the country's second largest city Los Angeles spent the night under curfew in an effort to quell five days of unrest.

Tensions escalated after President Donald Trump called up the National Guard over the objections of state and city leaders.