Threats were also made against schools in Prince George's County and Fairfax County, and police in Prince George's provided additional security there, the Washington Post reported. It is not clear if the social media threats in Maryland are related to one another, but in some of those Maryland cases, clowns were mentioned. Nationally police have reported instances of people dressing up as clowns and creeping in the woods in different states as a prank. In other cases, people have made threats about creepy clowns on social media.