A relative state of calm in Los Angeles began to crumble early Sunday afternoon as demonstrators confronted federal authorities guarding a downtown detention facility where chaos erupted as National Guard soldiers deployed tear gas on an increasingly agitated crowd.

The last time the National Guard was activated without a governor’s permission was in 1965, when President Lyndon B. Johnson sent troops to protect a civil rights march in Alabama.

Anti-ICE demonstrations are expected to spread to more cities this week after days of unrest in Los Angeles, with at least 30 new protests planned across the country in response to the Trump Administration’s recent immigration raids.