A massive explosion followed by a fire tore through the former Simmel Difesa ammunition factory in Colleferro, a town about 30 kilometres southeast of Rome, on Saturday morning. The blast was heard up to 30 km away, shaking windows in nearby neighborhoods, but according to police and fire authorities no one was injured.
Emergency response
Italian police, the Carabinieri, and dozens of firefighters from the regional civil protection quickly arrived on the scene. They reported that the fire originated in a powder‑press area of the plant and was brought under control within a few hours. Several fire engines and an aerial water cannon were deployed to douse the remaining hot spots, while a cordon was established to keep civilians at a safe distance.
Plant background and ownership
The facility, known locally as the ex‑Simmel Difesa plant, was taken over in recent years by the European defence consortium KNDS, a joint venture between Germany’s Rheinmetall and France’s Nexter. The site has been a key element of Italy’s domestic arms industry, producing small‑calibre ammunition for both the Italian military and export markets. Its location in the industrial town of Colleferro, part of the Metropolitan City of Rome, makes any incident there a matter of public safety and economic concern.
Local authorities stressed that the explosion did not affect the surrounding residential areas beyond the audible shockwave. Mayor Roberto De Angelis addressed the media shortly after the incident, stating that “the damage is limited and, most importantly, there are no injuries.”
"There are no injuries, and the damage is limited," said Mayor Roberto De Angelis, emphasizing the swift work of emergency crews.
Multiple outlets, including RaiNews, Euronews, The Independent, Al Jazeera and ABC News, corroborated the absence of casualties and reported that the fire was fully extinguished by early afternoon. Photographs released by local media showed a large, mushroom‑shaped smoke plume rising above the plant’s roofs, but the structure itself appeared to have sustained only superficial damage.
While the exact cause of the explosion remains under investigation, officials have not ruled out a technical malfunction in the powder‑press machinery. The Italian Ministry of the Interior has opened a formal inquiry to determine whether safety protocols were breached and to assess any broader implications for the country's defence manufacturing sector.
Residents expressed relief that the incident did not result in injuries, though some reported feeling shaken by the sudden roar and the tremor that followed. The town’s emergency services will continue monitoring the site for any residual hazards, and the plant is expected to remain shut until investigators complete their assessment.
For now, the incident stands as a reminder of the inherent risks associated with munitions production, especially at facilities that handle high‑explosive materials. The swift coordination among police, fire, and civil‑protection units, coupled with the absence of casualties, has been widely praised as a testament to Italy’s emergency preparedness infrastructure.
