San Diego State University has suspended 14 fraternities amid allegations that “possible misconduct” at one of them may have been linked to the death of a 19-year-old student over the weekend , the authorities said.

The student, Dylan Hernandez, was found without a pulse by his dormitory roommate and was hospitalized on Thursday after reportedly attending a fraternity event the night before, according to the San Diego County medical examiner’s office.

On Friday, the San Diego State University Police Department opened an investigation and the university president, Adela de la Torre , suspended the Interfraternity Council and its 14 affiliated fraternity chapters.

“Each of us, including our students, must uphold the highest standards that do not put the health and safety of anyone at risk,” Ms. de la Torre said in a statement about the suspension.