The University of Southern California canceled a commencement speech by its 2024 valedictorian who has publicly supported Palestinians, citing security concerns, a rare decision that was praised by several pro-Israel groups and lambasted by free speech advocates and the country's largest Muslim civil rights organization.

Andrew T. Guzman, provost and senior vice president for academic affairs for the private university in Los Angeles, said in a statement Monday that debate over the selection of valedictorian Asna Tabassum to give the May 10 commencement speech took on an "alarming tenor." Her speaking would have presented "substantial" security risks for the event, which draws 65,000 people to campus, he said.