U.S. Capitol Police said they've arrested more than 400 protesters for unlawfully demonstrating at the U.S. Capitol on the afternoon of April 11. The demonstrations were organized by Democracy Spring to protest "big money" in politics. (Reuters)

More than 400 arrests were made Monday at the Capitol in connection with Democracy Spring demonstrations there.

The Democracy Spring organization said it is calling on Congress to end the “corruption of big money” in our politics. It also asked congressional action to “ensure free and fair elections” and to prevent what it called “voter suppression.”

In an online statement, the group said many protestors reached Washington after a 10-day march from the site of the Liberty Bell in Philadelphia.

Photos show demonstrators with signs and banners near the Capitol’s east front steps.

Most of those arrested are being charged under D.C. law on crowding, obstructing and hindering, Capitol police said.

Demonstrators stage a sit-in at the Capitol in Washington on April 11, 2016. (J. Scott Applewhite/AP)

The police said those arrested for “unlawful demonstration activity” were being processed using “mass arrest procedures.”

On its website, Democracy Spring said it will continue efforts to “reclaim the Capitol” through Saturday.

It called for additional protesters to join “one of the largest civil disobedience actions in a generation.”