'No Kings' protest live updates: Cities prepare for anti-Trump rallies nationwide

The 700 Marines being sent to Los Angeles are currently undergoing a two-day civil unrest training to get "extensive training on crowd control," Maj. Gen. Scott Sherman of the National Guard told Los Angeles ABC station KABC.

President Donald Trump has sent 4,000 National Guardsmen to LA. There are 2,000 of them currently in LA and the other 2,000 will arrive by Thursday afternoon to begin training, Sherman said.

The soldiers' role is "solely to protect personnel to do their federal mission," Sherman said. He noted that the National Guard has been on raids as "protection of personnel as they do their federal job."

The guardsmen can detain people, but local law enforcement must make the arrests, he said.

Fear is growing in immigrant communities following recent ICE raids and many are unsure about their rights or what to do if they're detained.

"The anxiety, distraught, fear and sadness, it's really sad. And it's not just the person without the status, it's all of their family, their children, their spouses," said immigration attorney Elsa Martinez.

Martinez wants people to know they have rights, regardless of their immigration status - and it's crucial that people understand them.

Here's what to know.

A woman said she broke her arm as a car sped through a crowd of protestors in Chicago on Tuesday.

Thousands marched downtown Chicago Tuesday, protesting U.S. Immigration and Customs Enforcement arrests nationwide.

Heather Blair, 66, has scrapes to her face, and her left arm is now in a sling, after she says she was injured during the frantic moments a car sped through a group of anti-ICE demonstrators in Chicago's Loop.

"If a car is upset with a crowd. They usually go slowly and honk, right? They don't accelerate," Blair said.

Blair says she and her husband were part of the thousands of people packing the Loop Tuesday night, voicing their anger and frustration with ICE raids locally and across the country.

She says in those frantic moments she doesn't remember if she was actually hit by the car or fell over in the pandemonium of the moment.

She said she planned to demonstrate again this weekend, but doesn't know if she is going to be able to.

Chicago police did not immediately provide additional information about the driver in question.

Chicago police confirmed that multiple people were arrested amid anti-ICE protests in the Loop.

Four people were charged with felonies, they are due in court on Wednesday.

Police said charges were pending for two people.

Ten other people were charges with misdemeanors, mostly for reckless conduct.

One person was issued a citation for possession of paint with intent to deface.