PROVO, Utah (AP) — Brigham Young University students were among the protesters who yelled slurs at LGBTQ students and their supporters at a Labor Day weekend gathering in Provo Saturday.

About 100 protesters showed up at the “Back to School Pride Night” event over the weekend at a public park. A dozen people dressed up as angels supporting the LGBTQ students by standing in a line to block the protesters, per reports.

Police broke up a handful of clashes between the two sides.

The confrontation happened a week after BYU banned a fan who yelled alleged racial slurs at a Duke University volleyball player who is black during an August 26 match at Smith Fieldhouse.

BYU apologized, but Duke outside hitter Rachel Richardson criticized school officials for not reacting quickly enough during the match. South Carolina women’s basketball coach Dawn Staley later canceled a series between the Gamecocks and Cougars because of the alleged incident.

BYU is operated by The Church of Jesus Christ of Latter-day Saints and does not allow clubs for queer students to meet on campus, per reports. The school also forbids same-sex romantic partnerships and displays of affection among LGBTQ students.

Maddison Tenney, founder of the RaYnbow Collective and a senior at BYU, said she became concerned when police told her to expect a large crowd of protesters at Saturday’s event, which drew about 300 supporters.

Tenney said members of her group wore angel costumes to replicate the strategy used by friends of gay University of Wyoming student Matthew Shepard, after protesters showed up at the 1999 trial of two men accused in his killing.