A small group of white nationalists stormed a bookstore in Washington, D.C., to protest an event for a book on racial politics and how it’s impacting lower- and middle-class white Americans.

The group stormed the Politics and Prose bookstore on Saturday afternoon, interrupting a scheduled talk by Jonathan Metzl, a professor of sociology and psychiatry at Vanderbilt University who released his book “Dying of Whiteness: How the Politics of Racial Resentment Is Killing America’s Heartland” this spring.

Videos filmed by those in attendance showed the group standing in a line before the audience chanting, “This land is our land.” At least one man was yelling white nationalist propaganda into a megaphone while people in the bookstore booed him.

The man identified the group as “identitarians,” a far-right white nationalist group which is linked to Identity Evropa, which the Southern Poverty Law Center lists as an extremist group.