The U.S. Attorney's Office told CBS that Kim emailed bomb threats to university administrators, campus police and the student-run newspaper, the Harvard Crimson.
Kim wrote that "shrapnel bombs placed in science center, sever hall, emerson hall, thayer hall, 2/4. guess correctly. be quick for they will go off soon" in the emails.
Kim was supposed to take an exam at 9 a.m. Monday, according to CBS.
He will appear in court on Wednesday, and could face up to five years in prison, according to CBS.