Military-style vehicles and National Guards troops have blocked a portion of 4th Street in front of the Ronald Reagan Federal Building and Courthouse.

Defense Secretary Pete Hegseth forcefully defended the deployment of National Guard troops and U.S. Marines to Los Angeles during a hearing on Tuesday.

National Guard troops began protecting immigration agents as they made arrests in Los Angeles on Tuesday, an expansion of their duties that been limited to protecting federal property. THIS IS A BREAKING NEWS UPDATE.

Across the country, marchers similarly took to the streets in New York City in an anti-ICE protest that began in Foley Square, across from where immigration enforcement operations have been centered. Protests have have also been seen in San Francisco, Boston, Dallas, Chicago, Atlanta and more.

Defense Secretary Pete Hegseth on Tuesday defended the administration's mobilization of the National Guard and members of the Marine Corps to Los Angeles amid ongoing immigration protests.

DHS Assistant Secretary Tricia McLaughlin called the decision "deeply disturbing," accusing state officials of siding with criminals over public safety.

President Donald Trump has built his presidency around stretching the bounds of presidential authority, and his response to protests over an immigration crackdown in Los Angeles is no exception.

Gov. Gavin Newsom announced a lawsuit against the Trump administration for federalizing the National Guard in L.A. County over the weekend, saying the president abused his authority.

The fallout continues after days of protests against Immigration and Customs Enforcement (ICE) have gripped the Los Angeles area -- especially downtown L.A.

Troops on the streets of LA over ICE raid protests are escalating the battle between Trump & CA Governor Newsom As LAPD declares a tactical alert for city