Several Front Range colleges and universities were evacuated and placed under lockout protocol as campus security and local law enforcement investigated threats.
"FBI Denver is aware of the situations today involving college campuses and is supporting our local law enforcement partners," said Vikki Migoya, the public affairs officer at the FBI Denver Field Office.
The Colorado Community College System said it received threats of harm and violence toward the Community College of Aurora and other campuses Thursday night.
The University of Colorado Boulder and the Auraria Campus are also on a lockout. Here are other campuses affected: