A bomb threat at Princeton University has temporarily shut down the school Tuesday, and authorities are still searching the premises. It is unclear if the threat was legitimate or simply a hoax.

"Please evacuate the campus and all university offices immediately and go home unless otherwise directed by your supervisor," a message on the school's website said. "Do not return to campus for any reason until advised otherwise."

Luckily, there are not many students on campus currently. Princeton has already finished up the spring semester of classes and commencement was held last week. Still, for those still hanging around the Ivy League school, the threat is still unnerving.

Despite the supposed danger, it does not appear that the threat is of great magnitude. Law enforcement officials have so far not been able to find any bombs or otherwise suspicious devices, nor have they been able to locate the source of the call. The FBI has not gotten involved at this time.

"As of 3:30 p.m., no explosives had been found. Bomb-sniffing dogs brought in from law enforcement agencies were on campus, and University officials were doing other searches. The bomb threat at the University was one of a number of similar threats around the United States today," the website informed.

Those threats that Princeton's website referenced are in regards to two, presumably unrelated, events that took place in Virginia and Georgia today. A bomb threat at Richmond International Airport Tuesday morning caused a three-hour evacuation, while three state office buildings near Georgia's state capitol had to be evacuated for similar reasons.

The bomb threat at Princeton University encompassed multiple buildings on campus, which has in part led to the lengthy search of the campus. That search may not be complete until late tonight.