Princeton's Public Safety Department received a report of gunshots at Nassau Hall at 7:55 Tuesday evening.
Princeton Police and the Mercer County Sheriff's office responded to the scene.
There were no injuries reported and the call was later determined to be unfounded.
The university sent out an emergency alert informing the university community about the incident and advising people to avoid the area surrounding Nassau Hall.
After an extensive search, nothing was found and the all clear was given.