An online bomb threat has prompted Tokyo's Aoyama Gakuin University to call off classes at both campuses Monday, the university said.
The threat, discovered online by the police and reported to the university on Thursday, said: "A bomb has been placed on the university's premises, it may lead to many deaths after the Golden Week holidays."
In a statement on its website, the university said it decided to shut down its two campuses in Tokyo's Shibuya Ward and Sagamihara, Kanagawa Prefecture, as a precaution and is working closely with the police.
All students and faculty, except for a few administrative staffers who were guiding the police, were prohibited from entering the university grounds on Monday, according to university spokesman Shigeyuki Takagi.
Police had not found any suspicious objects as of Monday afternoon, and a few dozen officers and dogs were still probing the two facilities. Takagi also said the police had not yet identified the author of the online threat.