Emergency alert: "Possible report" of student with weapon on campus

Update: All clear issued at 8:48 am.A few minutes after 8 am, Public Safety sent an email to students about a possible threat on campus (Again?! To all the high school students running around terrified on campus right now: We're really, really not as bad as Yale.) :

"There is a possible report of a student with a weapon on Princeton campus. This is a real emergency. Public Safety will issue more instructions as information becomes available. Stay inside and be sure to check e-mail and the University home page, www.princeton.edu."

"Possible report?" Someone maybe, possibly reported it? We're really not sure, but it's a possibility that someone told us they saw something suspicious? Anyway, sounds like they're trying to cover their bases --you know, in case the weapon is a toy.