In a Tweet, the FBI Louisville field office says the threats were all posted online, adding "While we have no indication the threats are credible, we are taking them seriously and are actively working with local authorities to identify those responsible." The threats were reportedly directed towards students as well as Kentucky's U.S. Senators. The FBI says "Issuing a threat - even over social media of text message - is a federal crime." Adding, "Hoax threats are not a joke as they disrupt school, waste limited law enforcement resources, and cause unnecessary distress."