Universities across the nation started the school year on edge when a rash of fake active shooter calls sparked fear and uncertainty for students, parents and staff.

An online group called Purgatory has claimed responsibility for the hoax alerts, according to a report by Wired.

What we know:

Purgatory's self-proclaimed co-leader, known online as Gores, told Wired that the group will make hoax threats against schools for just $20.

However, school swatting prices have since risen to $95 amid media exposure in recent days.

Gores says the group has earned about $100,000 since the school swatting spree began on August 21.

The backstory:

Chaos erupted on campus last week when active shooters were reported at Villanova University and the University of Tennessee in Chattanooga,

Vill

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