Immigration and Customs Enforcement issued a stern warning Saturday after demonstrators during a large “No Kings” protest in Los Angeles vandalized a federal building with threats against ICE agents, clashed with law enforcement and sparked multiple arrests.

The protest, which organizers estimated drew as many as 50,000 participants to downtown Los Angeles, turned violent in the afternoon when an unknown individual spray-painted “Kill your local ICE agent” alongside two crosshairs on the side of a federal building. The message was discovered as thousands marched through the city’s streets for what organizers called a grassroots response to policies they describe as authoritarian.

The Los Angeles Police Department placed the city on tactical alert around 5:30 p.m. local time and issued a dispersal order, warning demonstrators to leave the area near Alameda Street or face arrest. Thirty minutes after the order was issued, officers began taking individuals into custody for refusing to comply. Police cleared most demonstrators from the area and lifted the tactical alert around 8 p.m.

U.S. Attorney Bill Essayli said federal agents had begun arresting those who assaulted personnel at the Los Angeles courthouse, noting that suspects who hurled projectiles at officers had been captured on video. “To those who were smashing concrete blocks and throwing them at our officers, we have you on video,” Essayli said. “We will find you and arrest you too. You’ve been warned.”

The Department of Homeland Security reported that two federal officers were struck by cement blocks and required medical attention. Authorities confirmed that at least two individuals were arrested on felony charges for assaulting federal law enforcement.

ICE responded to the threatening graffiti with a statement: “If you threat ICE, or their families, you WILL face the full force of federal law. Our courageous men and women face death threats, just like this, every day. Individuals making the threats will be held accountable.”

What the Left Is Saying

Organizers of the “No Kings” movement framed Saturday’s demonstration as a grassroots response to authoritarian policies, emphasizing community organizing and civic participation. “A lot of people want to help, they just don’t know where to start,” said organizer Emily Williams ahead of the event. “No Kings is that starting point. It’s about community, about showing up for each other, and about turning concern into real action you can be part of.”

Los Angeles Mayor Karen Bass defended the right to protest, calling the demonstrations “democracy in action” on social media. “Peaceful protest is our constitutional right,” Bass wrote. “When people come together to make their voices heard, that is democracy in action.”

The protest marked the third major “No Kings” demonstration in recent months, with organizers maintaining that the movement represents ordinary citizens expressing concern about federal policies they view as overreach.

What the Right Is Saying

Federal officials and Republican leaders have sharply criticized the demonstrations, with some linking the protests to extremist groups. House Speaker Mike Johnson characterized earlier “No Kings” protests as a “Hate America Rally,” drawing comparisons to Hamas and far-left terror organizations.

President Donald Trump previously dismissed the movement, stating he is “not a king.” The administration has maintained that federal immigration enforcement operations are legal and necessary.

U.S. Attorney Bill Essayli warned that those who assaulted federal officers would face serious consequences. “We have you on video,” he said. “We will find you and arrest you too.” The Justice Department has indicated it will pursue felony charges against individuals who attacked law enforcement.

What the Numbers Show

Organizers estimated attendance at Saturday’s Los Angeles rally reached 50,000 participants at Gloria Molina Grand Park outside City Hall. The Los Angeles Police Department did not provide its own crowd estimate.

Two federal officers required medical attention after being struck by concrete blocks thrown by demonstrators. At least two individuals were arrested on felony charges for assaulting federal law enforcement.

The protest lasted approximately six hours, with the tactical alert in effect from 5:30 p.m. to 8 p.m. Saturday evening.

This was the third major “No Kings” demonstration held in recent months, following similar events in other major cities.

The Bottom Line

The escalation of Saturday’s protest into violence and threats against federal agents marks a significant moment for the “No Kings” movement, which has sought to position itself as a peaceful expression of civic concern. While organizers emphasize community and democratic participation, the vandalism, threats against law enforcement, and assault of federal officers have provided ammunition for critics who characterize the demonstrations as extremist.

Federal authorities have indicated they will pursue criminal charges against individuals identified in video footage who threw projectiles at officers. The ICE statement makes clear that the agency intends to treat threats against its personnel as serious criminal matters.

What remains unclear is how Saturday’s events will affect future demonstrations — whether they will embolden supporters who view the response as government overreach, or diminish mainstream support for a movement now associated with violence and threats. Both sides will likely point to the day’s events as evidence of their respective narratives about federal power and the right to protest.