Several more colleges have been spooked by people threatening to repeat the carnage at Virginia Tech.

Classes at the University of Nevada at Reno were canceled on Thursday night after the police received reports that a man had sent a text message to a relative saying, “the Korean is my hero,” according to The Nevada Appeal. He also allegedly told another relative that he would be on a “mission” for the next few days. The man, who reportedly has a history of mental illness and had been convicted previously of carrying a concealed weapon, was arrested on Thursday night in Carson City, Nev., on a probation violation.

An 18-year-old student at Lewis-Clark State College, in Idaho, allegedly threatened to shoot people there on Friday to mark the eighth anniversary of the Columbine High School massacre, the Associated Press reported. The threat prompted the college to shut down for a few hours. The student, who reportedly had made similar threats in the past, was taken into police custody and detained at a medical center for a mental-health evaluation.

At Tennessee’s Austin Peay State University, the Associated Press writes, officials issued an emergency campus advisory after a former student made threats to the local newspaper and several government agencies. The former student complained of being banned from the campus and said that if she had been a violent person, the university might have experienced a shooting similar to that at Virginia Tech.

And at the State College, Pa., branch of South Hills School of Business and Technology, a student having computer problems on Friday said he wanted to kill someone and that “this might turn into another Virginia Tech,” according to the Associated Press. Many students left the campus out of fear, and the man was charged with two counts each of making terroristic threats and disorderly conduct. —Jennifer K. Ruark