Rochester, MN (KROC AM News) - Rochester Lourdes High School called off classes Friday because of a bomb threat.

A police spokesman says the call was actually made to the law enforcement dispatch center around 10:30 PM Thursday.

 The spokesman says the male caller said he was “going to blow up the school tomorrow.” The spokesman says it sounded like the caller was using a voice-changing device.

Police officers and a K9 assisted in the search of the building Friday morning but nothing was found.

News Update: The search is over for a missing Winona area woman.