Michigan State suspended three football players and a staff member while the university investigates sexual assault allegations.
The school didn't identify the players or the football staff member while announcing the discipline on Thursday.
No criminal charges have been filed in regards to the complaint, which was made in late January.
"Sexual assault is unacceptable, and members of MSU Athletics who fail to uphold our standards for creating a culture that is safe, supportive, and responsive to those affected by it will be held accountable," athletic director Mark Hollis said in a statement. "My expectation of all members of the department is full and complete cooperation with all investigations."
A Title IX investigation will also be conducted to see if policy was violated.
Football coach Mark Dantonio has yet to make a comment on the situation.