GRANITE FALLS (KMHL) – There were a few tense moments in Granite Falls Wednesday evening when a custodian at the Yellow Medicine East High School discovered a possible bomb threat.

According to the Granite Falls Police Department, the custodian found the threat shortly after 7 p.m. Surveillance video showed a person of interest – police say the student admitted to writing the threat, and told authorities there was no bomb.

According to authorities, the suspect is a minor and there will not be further information made available.