A 13-year-old student from Ann A. Mullen Middle School in Sicklerville, New Jersey was the subject of a police investigation, after sending a message with an “explicit photo” of his ex-girlfriend to other classmates.

According to Patch, the unnamed teen who was charged with harassment and third-degree invasion of privacy was caught after teachers became aware of an “inappropriate text message” circulating among the students.

Mullen principal Joanne Acerba left a message to parents, “As a result of an investigation by law-enforcement officials, an inappropriate picture of a student has been forwarded via cell phone text messaging to an undisclosed number of students. This picture reveals an explicit young female. Obviously, this is a serious matter for the district, law enforcement and the parents of students who may have saved this picture on their cell phones and/or transferred it to a computer.”

The police investigation has been completed and no other students have been charged.