As protests continue, Newsom to take on Trump in court over troop deployment in LA

Tensions flared across Los Angeles county Monday evening as protests entered their fourth night.

Immigration raid protesters faced off with law enforcement in Huntington Park and Santa Ana, but the largest protest is underway in downtown Los Angeles where a dispersal order was given and people are getting arrested.

At one point, police said protesters near Temple Street and Los Angeles Street in downtown LA began throwing objects at police and police authorized the use of "less lethal munitions" in response.

Video from AIR7 showed the tense moments protesters confronted authorities.

Immigration protests continued for a fourth night in Los Angeles.

Fireworks were seen going off in the middle of the crowd as they came face to face with officers.

People scattered as a firework was kicked back in their direction by a Los Angeles County sheriff's deputy.

The Los Angeles Police Department formed skirmish lines to hold the protesters back.

Members of the California National Guard were seen standing guard in front of the Edward R. Roybal Federal Building in downtown LA -- the site of protests over the weekend.

Immigration raid protesters faced off with law enforcement in Huntington Park and Santa Ana, but the largest protest is underway in downtown Los Angeles where a dispersal order was given and people are getting arrested.

ABC News contributed to this report.

The number of National Guard troops on the ground in the Los Angeles area has risen from 300 to 1,700, the Defense Department said in an update Monday evening.

The guardsmen are from the 79th Infantry Brigade Combat Team, a California National Guard unit. They are operating under Task Force 51, which also includes 700 Marines, to protect federal personnel and property, U.S. NORTHCOM said in a statement.

President Donald Trump's memo over the weekend authorized a deployment of 2,000 National Guardsmen amid unrest during protests over immigration enforcement in the LA area.

California Gov. Gavin Newsom said Monday he had been informed Trump planned to deploy an additional 2,000 National Guard troops.

The Federal Bureau of Investigation has identified a man who is wanted for throwing rocks at police and law enforcement vehicles during the protest in Paramount on Saturday.

The suspect has been identified as 40-year-old Elpidio Reyna, from nearby Compton, and is wanted for assault on a federal officer, according to the FBI.

The FBI is offering a reward of up to $50,000 for information about the suspect, leading to his arrest and conviction.

The incident happened at approximately 3:30 p.m. on Saturday, according to the FBI, when the suspect threw rocks at law enforcement vehicles on Alondra Boulevard in Paramount, injuring a federal officer and damaging government vehicles.

Los Angeles Mayor Karen Bass called on the Trump administration to stop immigration raids in the city, saying the fear and uncertainty they have created have led to the unrest.

"I am hopeful that the federal government will hear our plea: Stop the raids," Bass said. "This is creating fear and chaos in our city, and it is unnecessary. And I hope that we will be heard because our city is trying to move forward and I believe that the federal government should be supportive of us moving forward."

Bass said she spoke to members of the Trump administration over the weekend, urging the federal government not to deploy the National Guard. Bass said she has not spoken directly to President Donald Trump.

"It makes me feel like our city is actually a test case, a test case for what happens when the federal government moves in and takes the authority away from the state or away from local government," she told reporters during a news conference Monday. "I don't think that our city should be used for an experiment."