LOS ANGELES (AP) — The University of Southern California has canceled a commencement speech by its 2024 valedictorian, a Muslim student who has expressed support for Palestinians, citing “substantial” security risks for the event that draws 65,000 people to campus.

Andrew T. Guzman, provost and senior vice president for academic affairs for the private university in Los Angeles, said in a statement Monday that the debate over the selection of the valedictorian has taken on an “alarming tenor.”

“The intensity of feelings, fueled by both social media and the ongoing conflict in the Middle East, has grown to include many voices outside of USC and has escalated to the point of creating substantial risks relating to security and disruption at commencement,” Guzman wrote.

Valedictorian Asna Tabassum, who is graduating with a major in biomedical engineering and a minor in resistance to genocide, said she was blindsided by the decision, in a statement provided Tuesday by the Greater Los Angeles Area office of the Council on American-Islamic Relations. She said university officials on Monday told her that the school had the resources to take appropriate safety measures but they were concerned about their image.