By: Richard L. Smith
A Denville man is facing multiple criminal charges after authorities uncovered what prosecutors described as a large-scale homemade explosives operation during the execution of a search warrant this week.
According to the Morris County Prosecutor’s Office, Joseph Rizos, 37, was arrested Wednesday, June 24, following a months-long investigation led by the office’s Special Operations Division.
Investigators executed a search warrant at Rizos’ Avondale Road residence after first conducting a motor vehicle stop to detain him.
Inside the home, authorities discovered what they described as a laboratory containing explosive precursors commonly used to manufacture homemade explosives, along with blasting caps, cell phones, firearms, and ammunition.
A subsequent search of a shed on the property led to the seizure of approximately 109 individual containers of suspected homemade explosive material that prosecutors said were capable of causing massive destruction.
Officials also determined there was no state permit authorizing the storage of the explosive materials.
As a precaution, nearby homes were temporarily evacuated while investigators secured the scene.
The investigation began in March 2026, and authorities allege Rizos operated a destructive device manufacturing operation throughout 2025 and into 2026.
Rizos has been charged with one count of second-degree recklessly risking widespread injury or damage and four counts of third-degree possession of destructive devices.
Prosecutors said additional charges may be filed as the investigation continues.
He remains held at the Morris County Jail pending a detention hearing.
Morris County Prosecutor Robert J. Carroll praised the work of investigators and the numerous local, state, and federal agencies that assisted in safely dismantling the operation.
He added that while the case may generate public speculation due to other high-profile events occurring in North Jersey, authorities are not discussing a possible motive or intent while the investigation remains active.