Nineteen-year-old William Koberna was arrested at his parents' home in the Cleveland suburb of Brunswick on Sunday afternoon. The sophomore has been charged with inducing panic, a felony, and aggravated menacing. He was to be arraigned Monday.
A university spokesman says the tweet was posted July 25.
University officials monitoring Twitter last week noticed the profanity-laced message and contacted police. They said it included the threat: "I'm shooting up your school ASAP."
Kent State University President Lester Lefton said in a statement that "our students, employees, and all those who come to campus should know that their safety is our top priority."