Swatting incidents have occurred at Villanova and University of South Carolina in recent days. What is going on? What is swatting? What to know.

F or the second time in less than a week, Villanova University was the scene of an active shooter hoax report on Sunday, prompting police to clear buildings at the Pennsylvania campus before investigators determined the incident was not legitimate, officials said.

Authorities are investigating two reports of active shooters that were both deemed false at Villanova University over the last four days. The false reports prompted shelter-in-place orders as well as large police responses as the college outside Philadelphia began fall semester.