MISHAWAKA, Ind. – The School City of Mishawaka sent out a letter to families on Sunday concerning a threat left on a bathroom wall at Mishawaka High School that school officials believe is associated with a recent TikTok challenge.

Schools officials said they worked with the Mishawaka Police Department and found that the note handwritten on a bathroom wall was a non-credible threat.

School officials also said that while they are confident the incident is associated with a recent TikTok challenge, they will have an additional police presence at the high school on Monday, September 20.

The school corporation did not say what the note said.