Just after 11:30 a.m. the Holmdel Police Department got a call saying there was a bomb located within the confines of the school.
The school was immediately placed on lockdown, and was evacuated. All students and personnel are safe.
The Monmouth County Sherriff's office conducted a room-to-room search of the building, and multiple sweeps of the school and found no explosives.
Arrangements are being made to send students home, as access to the building will not be possible while the police continue to investigate the threat.
Parents may pick up their kids at St. Benedict's School. Buses will also be diverted to that location.
"I want to express my deepest gratitude to the administration, faculty and staff of St. John Vianney High School for their prompt and immediate actions to keep our students safe," said Bishop O'Connell, C.M., "I also want to thank St. Benedict's Parish and School community for providing a safe and comfortable shelter for the evacuated high school students."
Anyone with information on the incident is being asked to call the Monmouth County Prosecutor's tip line at 1800-533-7443.