Protests live updates: Marines make 1st temporary detention in LA

The U.S. Northern Command has confirmed that National Guard troops are on the ground in Los Angeles.

The California National Guard 79th Infantry Brigade Combat Team (IBCT) "has deployed approximately 300 soldiers to 3 separate locations in the greater Los Angeles area," the U.S. Northern Command posted on X.

"They are conducting safety and protection of federal property & personnel," the post added.

The announcement came about an hour after a previous post confirming that the deployment had begun, noting that "additional information will be provided as units are identified and deployed."

The U.S. Northern Command's mission is to "provide command and control of Department of Defense homeland defense efforts and to coordinate defense support of civil authorities," according to its official website.

Calif. Gov. Gavin Newsom's office told ABC News Sunday morning that about 300 National Guard troops are on the ground there, far fewer than the 2,000 the White House said had been deployed in their Saturday-evening statement.

According to the Los Angeles Police Department, 11 arrests were made at Saturday night's protests outside the federal building in downtown LA. The arrests were primarily for failure to disperse once the order was given for an unlawful demonstration, according to officials.

-ABC News' Alex Stone

The deputy director of the FBI said "multiple arrests" have been made in both Los Angeles and New York after protests broke out in both cities due to immigration enforcement.

"We are not intimidated or apprehensive," FBI Deputy Director Dan Bongino said on Sunday morning in a post on X. "Illegal immigration operations will continue, and anyone using violence to obstruct or impede these operations will be investigated and prosecuted."

Bongino added, "We are not stopping or slowing down."

Bongino said many of those arrested "will face federal charges, along with local and state charges."

"It will not end well for you if you choose violence. Choose wisely," Bongino said.

In a post on X Saturday night, FBI Director Kash Patel warned: "Hit a cop, you’re going to jail… doesn’t matter where you came from, how you got here, or what movement speaks to you. If the local police force won’t back our men and women on the thin blue line, we @FBI will."

"Violence and intimidation against federal law enforcement will be prosecuted to the fullest extent of the law," according to a Sunday-morning post on X by the Department of Homeland Security. "These violent rioters are fighting against LAW and ORDER," the post added.

-ABC News' Luke Barr

House Speaker Mike Johnson said he is “not concerned at all” over President Donald Trump's order to send 2,000 National Guard troops to respond to immigration protests in Los Angeles.

“I think the president did exactly what he needed to do,” Johnson told ABC News' "This Week" co-anchor Jonathan Karl on Sunday. “That is real leadership and he has the authority and the responsibility to do it.”

Secretary of Defense Pete Hegseth said he is prepared to mobilize Marines if the violence continues. Pressed if sending Marines into the streets of American cities is warranted, Johnson said, “We have to be prepared to do what is necessary.”

-ABC News' Lauren Peller