The incident occurred at the Rosa International Middle School at 485 Browning Lane.
Sources say a 13-year-old male student left a note, reportedly a student hit list, as a prank.
But neither the Cherry Hill school district nor the police are amused by the incident.
The district did not comment, but the school sent home a letter to parents, which stated the note listed people and that the student was apprehended.
The letter also stated no one at the school was ever in danger.
Cherry Hill Police would not comment about the incident.