ANN ARBOR, Mich. -

On Monday evening, officials at Pioneer High School informed parents and staff of a threatening statement that was posted on a Facebook page called "Pioneer HS Confidential." The message, which was posted around 8:00 p.m., read "I'm going to shoot up the school."

The Pioneer HS Confidential Facebook page is not associated with Pioneer High School, so anyone can submit posts. The submission form promises 100% anonymity to posters, but notes that confessions may be filtered. With the help of Facebook and Google Drive, which is used to post to the Facebook site, the post was traced.

Based on an assessment by local police, the school determined that there was no credible threat to Pioneer, so school was held as usual. An arrest was made in the morning before classes began and the suspect in custody admitted to posting the statement. It is unclear at this time if charges will be issued.

"Law enforcement takes the lead in these issues," Pioneer spokeswoman Liz Margolis said. "They are the experts and we trust their analysis."

Ann Arbor Public Schools takes social media issues very seriously because of the direct impact they can have on the learning environment. Threatening statements about schools or directed at individual students on social media sites are investigated to ensure the safety and security of students and staff.