NEW ORLEANS (AP) — Xavier University’s pick to deliver its undergraduate commencement address has sparked criticism among students who oppose past positions by the U.S. on the war in Gaza.

U.S. Ambassador to the United Nations Linda Thomas-Greenfield is scheduled to speak at 1 p.m. Saturday to graduates of Xavier’s College of Arts and Sciences, The Times-Picayune/The New Orleans Advocate reported. In an announcement, the school described the Louisiana native, who is from Baker and graduate of Louisiana State University, as a “trailblazing Black woman” who forged her own path.

But soon after news of her appearance at the historically Black university spread, students asked the administration to cancel her speech and created an online petition calling for the same. They have also asked university officials to review how commencement speakers are chosen in the future.