The Princeton community can exhale for now.
No explosives were found on Princeton University's campus after it was evacuated Tuesday, spokesman Martin Mbuaga said in a press conference Tuesday evening.
The threat was received at 9 a.m. and the university ordered a full evacuation soon after.
"There has been a bomb threat to multiple unspecified campus buildings," the alert read. "Please evacuate the campus and all university offices immediately and go home unless otherwise directed by your supervisor."
The Nassau Inn, the Princeton Public Library and the Princeton Arts Council building in downtown were all designated as safe houses for those without transportation.
The university immediately closed all of its operations and ordered just the personnel of the school's Department of Public Safety to stay on campus and assist in the investigation. The school reopened around 6:30 p.m., reported the Trenton Times.
Local, state and federal police thoroughly searched the campus with bomb-sniffing dogs and discovered no bombs.
Most of the school's 9,000 faculty and staff, undergraduate and graduate students had left for the summer, but nearly 7,000 were evacuated Tuesday.
Ninety minutes passed between the threat and the evacuation order. Mbuaga said the time was taken to weigh the seriousness of the threat.
"There were discussions that led to the decision to evacuate the campus," Mbugua said.
The exact time of the called-in threat was 8:57 a.m. Princeton Police Captain Nick Sutter said he received a notification by 9 a.m., at which point he sent police to assist on campus.
"The phone call came into their dispatcher, who then phoned our dispatcher and I knew about the incident within minutes," Sutter said.
Emily Whitaker was one of about 70 students who took refuge at the Princeton Public Library.
"To be honest it was scarier than I thought," Whitaker told CNN. "It's very safe here. Princeton has always been such a safe place for all of us so this is strange."
