At slightest a half-dozen universities crossed nan federation connected Monday welcomed students to first-day-of-fall classes pinch run-and-hide warnings astir imaginable gunmen connected campus.
In almost each nan cases, constabulary and administrators said nan reports were hoaxes aliases swatting calls, which is erstwhile personification uses impermanent cellphone numbers and voice-cloaking apps to create havoc. A fewer campuses said simply that nary grounds of a gunman aliases unit was found.
The reports were sent to students astatine nan University of Arkansas, Colorado State University Boulder, Iowa State University, Kansas State University, University of New Hampshire and Northern Arizona University, according to student alerts and schoolhouse statements.
Additionally, according to field officials, nan University of South Carolina received 2 reports of an progressive shooter astatine Thomas Cooper Library successful Columbia connected Sunday night; nan University of Tennessee-Chattanooga received a hoax progressive shooter telephone connected Aug. 21; and Villanova University received 2 mendacious progressive shooter reports during freshman predisposition past week.

The University of Arkansas canceled classes Monday aft determining reports of "active threats" could not beryllium confirmed. "Students are free to time off field astatine this clip if desired," university constabulary said.
Kansas State University described a mendacious report Monday astatine its Manhattan field arsenic "similar to different swatting reports happening astatine universities crossed nan country."
University of South Carolina constabulary said successful a connection Monday that some mendacious reports from Sunday nighttime appeared to beryllium carried retired by nan aforesaid antheral and triggered a monolithic consequence that included "mutual aid," aliases officers from surrounding communities.
"Both calls were initiated by an chartless antheral and included inheritance sound that mimicked gunfire," constabulary said.
Northern Arizona University said successful a connection that a caller reported a gunman Monday astatine Cline Library connected its Flagstaff Mountain Campus, triggering a consequence that included Flagstaff police, Coconino County Sheriff's Office deputies and authorities and national agents.
"The study was wished to beryllium a hoax, and astatine nary clip was location an progressive threat to nan NAU community," nan assemblage said successful a statement. "An investigation is underway into nan mendacious report, pinch assistance from nan Federal Bureau of Investigation."
An FBI spokesperson said nan bureau was alert of galore of nan reported incidents and was helping pinch investigations.
"The FBI continues to activity pinch authorities and section partners to analyse nan swatting hoaxes but cannot opportunity astatine this shape whether aliases not nan incidents are connected," nan bureau said.
Some of nan earliest swatting incidents from nan 2010s progressive mendacious shooting reports astatine nan homes of celebrities, and successful caller years, they've expanded to see politicians and institutions. The FBI created a national database to way specified clone calls.
Last year, authorities alleged a California teenager carried retired hundreds of swatting calls that targeted historically Black colleges, precocious schools, nan homes of FBI agents, and a Florida mosque successful a spree he yet admitted carrying out.

Dennis Romero
Dennis Romero is simply a breaking news newsman for NBC News Digital.
Michael Kosnar
,
Alexandra Hess
,
Tangni Noriega
,
Jean Lee
and
Colin Sheeley
contributed
.