Cornell University has canceled classes Friday to acknowledge the “extraordinary stress” its campus has been under as one of its students is accused of making violent antisemitic threats against Jewish people at the college, where unease over the Israel-Hamas war has been escalating for weeks.

A junior at the university, 21-year-old Patrick Dai, has been arrested and federally charged in connection with a series of online posts over the weekend which threatened to kill and harm Cornell’s Jewish students, New York prosecutors say.

Dai appeared in federal court Wednesday on a charge of making a threat using interstate commerce but did not enter a plea. He was remanded back into the custody of US marshals. His defense attorney, Gabrielle DiBella, declined to comment after the hearing.