Update: The University at Buffalo announced that Sebastian Serafin-Bazan, the student who was hospitalized after a “suspected hazing incident,” died on Wednesday. In a statement, Satish K. Tripathi, the university’s president, said, “Our hearts go out to Sebastian’s family for the devastating heartbreak they are experiencing.”

The University at Buffalo this weekend suspended all official activities of its more than 35 social fraternities and sororities after a freshman was taken to the hospital in what the school has called a “suspected hazing incident.”

Early Friday morning, Sebastian Serafin-Bazan, an 18-year-old student from Port Chester, N.Y., was transported to Buffalo General Hospital after going into cardiac arrest at the Sigma Pi fraternity house near the university. As of Sunday afternoon, he remained at the hospital in critical condition, according to the school.

After the police opened an investigation, Satish K. Tripathi, the university president, announced the suspension and a full review of the school’s Greek system.