The Gillette Police Department has officers and detectives on site.
From Campbell County School District:
Good morning my name is Dennis Holmes, Principal at Thunder Basin High School. We have rumors regarding a possible threat to the school. We have not found any credible information regarding the threat. We have a heightened sense of awareness at the school. Law enforcement and district official are at the building helping look into the rumors and security.
We are investigating any leads and talking to students who say they have information.
If you are concerned please feel free to check your student out. If you have information please call law enforcement or the school. Thank you for all your help.