Two universities in Osaka Prefecture evacuated their campuses on Monday after a bomb threat was made out of apparent anger over the English name of their planned merged school, the operator of the schools said.

A bomb threat against Osaka Prefecture University and Osaka City University was sent by email to the Sakai city office, saying it was "retribution against the English name" of the new university, according to University Public Corporation Osaka, which operates the schools. Osaka Prefecture University is located in Sakai.

The email said the bombs will detonate at noon on Wednesday and sarin gas will be released on their campuses.