MISHAWAKA, Ind. - The School City of Mishawaka and John Young Middle School Principal Mike Fisher sent a letter to families Thursday addressing three separate threats to the middle school this week.

According to the letter, the threats were not related and deemed not credible by investigators.

There is no imminent threat to students and staff, Fisher said.

On Monday, the Mishawaka Police Department began investigating a threat made to the school via social media.

According to police reports, the juvenile suspect posted a picture of a knife on Snapchat with a warning to not come to school the following day.

Even if a threat is a hoax or joke, it could end in educational consequences and criminal charges, the letter to families reads.

The school corporation takes all matters related to school safety seriously, Fisher said.

Read the full letter below: