Princeton University was evacuated on Tuesday after shool officials received a bomb threat to "multiple unspecified campus buildings," law enforcement said.
The university's website at 10:26 a.m. EDT ordered all students and staff to leave the area and "do not return to campus for any reason until advised otherwise."
The university is working with local, state and federal law enforcement to investigate, The Associated Press reported.
Most of the Ivy League school's 5,000 undergraduate and 2,500 graduate students had already left for the summer, AP said. Classes had ended days ago. About 30,000 residents live in the area of the school.
The evacuation is the most recent in a line of suspicious incidents hitting at seemingly random U.S. spots on Tuesday.
Portions of Hartsfield-Jackson Atlanta International Airport were evacuated Tuesday morning, following the explosion of a maintenance shed, Reuters reported. The explosion took place around 9 a.m. EDT, and investigators are still trying to determine its cause.
Meanwhile, the Georgia State Capitol received a bomb threat around the same time frame. A little earlier, Virginia authorities closed down part of Richmond International Airport, on the heels of an unspecified telephone threat — and law enforcement brought in bomb-sniffing dogs to investigate some terminals and facilities, AP reported.
The Richmond airport resumed its regular flight schedule about 9:45 a.m., AP said.
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