Hundreds gathered at the Colorado State Capitol on Tuesday to protest the White House’s mass deportation campaign.

Many protesters wore gas masks, which they said were out of fear of being tear-gassed. Others wore face coverings to protect their identities.

Several Mexican flags were visible, along with homemade signs opposing U.S. Immigration and Customs Enforcement.

The crowd chanted, “Trump!” “¡Fuera!” and “We want ICE off our streets!”

One woman, a 28-year-old who identified herself only by her first name, Nayda, said she is an immigrant from Mexico who is living in the U.S. illegally. She said she wanted to show support for the protests in Denver and Los Angeles.

“It’s important that we protest so people understand the urgency of the situation,” she said. “We know history repeats itself.”

She wore a black bandana over her face and said other organizers protesting the deportations had been picked up by ICE agents.

After the Capitol rally, videos posted on social media showed a confrontation between protesters and police at Broadway and West Exposition Avenue. It was unclear if the same group had marched from the Capitol.

9NEWS crews saw police deploy pepper balls and smoke canisters and make arrests. Denver police said Wednesday they made 17 arrests.

Protests in Los Angeles, which began over the weekend, continued Tuesday.

While no official crowd estimate was available, the group that began on the Capitol lawn stretched at least three city blocks as it marched to the Byron White U.S. Courthouse on Stout Street.

“Do not wait for the voting booth to save you!” shouted Jesus Loayza, a member of the CWA Local 7799 union for public defenders, from the bed of a red pickup truck parked in front of the Capitol. “It will not.”

Loayza urged protesters to organize and said he was concerned about President Donald Trump declaring martial law.

Martial law is the substitution of military authority for civilian rule, often used in times of war, rebellion or natural disaster.

“We know the crackdowns are not normal,” Loayza said.

The only visible police presence Tuesday was for traffic control to clear streets for the march.

Tuesday’s event marked the second day of demonstrations in Colorado in response to Trump’s actions in Los Angeles.

On Monday, the Pentagon confirmed it is doubling the number of National Guard troops in L.A. to 4,000. They would join the 700 Marines already deployed, Reuters reported.

Trump campaigned on promises to secure the border and deport immigrants living in the country illegally.

Denver Gazette news partner 9News contributed to this report.