A gun control group says 75,000 new people have signed up to volunteer since a gunman opened fire last week at a Florida high school, according to CNN.

Moms Demand Action for Gun Sense in America — a group that was formed after the 2012 Sandy Hook Elementary School shooting — told CNN that it is seeing an influx of people who want to help.

The group's leaders told the broadcaster that more than 500 people showed up to a recent meeting in North Carolina, and 250 volunteers attended a meeting in Maine — far more than the group normally sees.

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The group says on its website its goal is to demand that lawmakers, companies and education institutions "establish common-sense gun reforms."

Moms Demand Action founder Shannon Watts told CNN that next generation is "angry," noting they have "spent their whole lives doing active-shooter drills."

They are "vulnerable while lawmakers are acting like shootings are acts of nature like a fire instead of disarming dangerous people," she said.

The organization, she said, looks to help train volunteers to fight for action on gun control and to help the newly formed Students Demand Action group.

But results likely won't happen immediately, she said.

"We all want a cathartic moment in Congress," Watts told CNN. "I'm hopeful, but I don't think it's going to happen."

On Wednesday night, the organization is reportedly organizing a teleconference that will include people from across the country.

The influx of volunteers comes after 17 people were killed last week when a gunman opened fire at a high school in Florida.

The shooting has set off nationwide protests. Students who survived the shooting went to the Florida state Capitol on Wednesday to demand that lawmakers take action to prevent future school shootings.

Students across the country are organizing walkouts, with students from multiple schools in Maryland on Wednesday walking out of class and marching to the U.S. Capitol to demand change.

A march has also been planned for later this year in Washington, D.C., to protest gun violence.

Students who survived the shooting are warning lawmakers that they won't back down on their calls for gun control.