Adapted from a story by The Washington Post’s Marissa Lang.

“Abolish ICE,” the protesters shouted as they were arrested and moved out of the building. “Shut it down.” They continued to sing and chant as they were led away.

When the first group was escorted out of the building, the remaining crowd erupted in cheers.

The protesters came prepared to be arrested Thursday in Washington. They hailed from all over, took planes and buses from 47 states, slept at friends’ homes or in churches.

Most of the participants were white women, stumbling over the syllables of Spanish-language chants. Many had never faced arrest before. But here they were.

Capitol Police said 575 protesters were arrested and escorted out of the Hart Senate Office Building in a mass demonstration that called for the abolishment of the U.S. Immigration and Customs Enforcement agency, and an end to migrant family detentions and the Trump administration’s “zero tolerance” immigration policy.

They were charged with unlawfully demonstrating, a misdemeanor.

“I have two kids, and as a white mother, there is almost no circumstance that they would be taken away from me — ever,” said Victoria Farris, who slept Wednesday night in All Souls Church after participating in civil disobedience training. “I was awake one night because I couldn’t sleep thinking about all those [immigrant] mothers and terrified children. I realized I had to do something more than protest, more than make a sign and march.”

Protesters unfurled banners inside the Hart building Thursday as others staged a sit-in, wrapping themselves in shiny, silver space blankets. The political banners, which aren’t allowed in the building’s lobby, were confiscated by police.

The arrests began just after 3 p.m., as protesters were rounded up in groups of a dozen or more and led out of the building. As police continued to clear the area, several senators greeted demonstrators, including Kirsten Gillibrand (D-N.Y.) and Tammy Duckworth (D-Ill.).

“I join them in calling on the Trump administration to reunite these families and give these kids back to their parents,” Duckworth said. “On my side of things, I ask my colleagues, let’s pass, finally, sensible immigration reform.”

Rep. Pramila Jayapal (D-Wash.) joined in the protest and was led out with marchers by Capitol Police. Actress Susan Sarandon, who marched at the front as the protest made its way down Constitution Avenue, was arrested with a group of demonstrators.

It took about an hour to clear the women from the building.

The protest began hours earlier at Freedom Plaza, where hundreds of women robed in white and carrying signs deriding the Trump administration’s immigration policy had gathered. The protest was organized by a coalition of groups, including the Women’s March and the immigrant advocacy organization Casa de Maryland.

Several participants wrote “WE CARE” on their palms, a rebuke of the jacket first lady Melania Trump wore on her first trip to visit detained children near the border.

After gathering at Freedom Plaza, the group marched to the Justice Department before heading to the Hart building, singing hymns and protest songs all the way.

As they marched along Pennsylvania Avenue, past the Trump International Hotel, the crowd began to chant, “Shame,” then burst into boos and demanded, “Where are the children?”

Approaching the Justice Department, the group fell silent, raising fists and hands in the air. Several federal workers on a lunch break wandered over to the fringe of the protest, taking pictures and clapping as the group of white-clad women walked on.

When they reached the front of the Justice Department, hundreds crowded the street and sat. Police cars blocked the area as officers allowed the sit-in to proceed. Several drivers who were able to squeeze by honked and gestured in solidarity.

In the Hart building, onlookers cheered as the women sang and chanted. Senate staff members in one office held a pink sign in the window: “Feminists are the majority.”