Officials at Virginia Tech are urging calm as e-mails and Internet postings threaten another attack on campus.
The postings originate out of Italy. But police do not believe the threats are credible.
"Given all that this university has endured, I can understand how this can be very upsetting to the university community" said University President Charles Steger in an e-mail.
A YouTube user had created a Web page under the name "nextvirgtechkiller" that included the statements "the massacre is incoming" and "next massacre is incoming."
The person believed responsible has been sending threatening e-mails to students and employees over the last several days, said Steger.
The university investigated similar threats earlier this month and last October and believe the new posts are from the same person.
Virginia State Police and the FBI are assisting in the investigation.
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Virginia Tech was the scene of the worst mass shooting in modern U.S. history in April 2007. Student Seung-Hui Cho of Centreville, Va., killed 32 people on campus, then committed suicide.
