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.

University of South Carolina students were told to shelter in place Sunday after an unconfirmed report of an active shooter on the main campus.