Ewing Township officials say the 12-year-old Fisher Middle School purchased the stun gun online and brought it to school on Monday.
Michael Nitti, Superintendent of Ewing Public Schools, released a statement saying the administration was notified the student was in possession of the stun gun while on the bus.
"The building administration immediately investigated the allegation and confiscated the device," the statement read.
Nitti says the student will be disciplined according to school board policy.
"Furthermore, the school district notified the police and will seek to press charges," the statement read.
Though the student told police he brought the stun gun for protection, Nitti writes in the school statement that there is no sign the student was being bullied.
"The safety of our students is always the foremost priority of the Ewing Public Schools. There is no evidence to suggest that the student involved in the disciplinary incident was being bullied or threatened in any way at Fisher Middle School," the statement stated.
Both Ewing police and school personnel continue to investigate.