Two teenagers were arrested in Knox County for making a threat against a school on social media. The sheriff’s office says the threat was made on Instagram at around 8:15 Monday night. They said the language used in the post on the app was “threatening in nature” towards South Knox Middle/High School and immediately began investigating. About an hour and a half later the teenagers were arrested. The sheriff’s office says there is no longer a credible threat toward the school, but additional deputies will be present on school grounds just in case.