Major Explosion and Fire Strike KNDS Ammo Italy Plant, Cause Undetermined

The KNDS Ammo Italy site is active in Colleferro and also operates in Anagni, near Rome.
KNDS Ammo Italy is described as Italy's largest producer of medium- and large-caliber ammunition.
The plant supplies naval ammunition, including 76mm and 127mm rounds for Leonardo/Oto Melara guns.
Officials have not disclosed whether the blast was linked to sabotage or hostile action and investigations are ongoing.
Dramatic video footage described a massive explosion and fireball, with firefighting efforts initially hindered by the presence of explosive materials.
A massive explosion tore through the KNDS Ammo Italy munitions plant in Colleferro, southeast of Rome, on Thursday, collapsing a powder-pressing department and sending a towering fireball and plume of smoke visible for kilometres, according to Yahoo News and Head Topics. The blast was heard by residents across the surrounding area, and emergency crews rushed to the scene as fires burned inside the facility.
Firefighters faced major obstacles in the early response. The presence of explosive materials inside the plant slowed their ability to move in and fight the blaze, WDSM reported. Officials had not confirmed any casualties or disclosed a cause as of the latest reports, and investigations are ongoing.
The Colleferro facility is operated by KNDS Ammo Italy, formerly known as Simmel Difesa. It is now part of the Franco-German KNDS defense group. Yahoo News described it as Italy's largest producer of medium- and large-caliber ammunition. The plant makes shells for land and naval use, as well as solid rocket fuels for aerospace launch vehicles.
Among its key products are 76mm and 127mm naval rounds used in guns made by Leonardo's Oto Melara division. These are standard weapons on many NATO warships. The site also operates a second facility in Anagni, also near Rome, according to WNFL Sports.
Witness footage showed a massive fireball rising from the factory grounds. The explosion collapsed the plant's powder-pressing department — the section where explosive propellant is shaped under high pressure. That is one of the most dangerous steps in ammunition production. Head Topics reported the explosion was heard kilometres away from the plant.
Initial firefighting teams were on site when the explosion occurred but could not immediately move in. Explosive materials scattered around the blast zone created a serious risk for responders. Police also arrived to secure the perimeter, WDSM reported. The full scale of structural damage to the plant remains unknown.
Authorities have not confirmed what caused the explosion. Officials have not ruled out sabotage or hostile action. The investigation is in its early stages. Italy's defense industry has faced growing scrutiny over security as European nations ramp up ammunition output to support Ukraine, The Independent noted.
The timing adds to broader concerns about European ammunition supply chains. KNDS Ammo Italy is a key supplier to Italian and allied navies. Any damage to its production lines could affect deliveries of naval shells at a moment when demand across Europe is already outpacing supply.
As of the latest reports, no official casualty count had been released. Teams were still working to assess how many people may have been injured or killed inside the plant. Yahoo News reported that officials were on scene but had yet to confirm any figures. The affected production lines also remain unidentified.
The blast has drawn wide attention given the plant's strategic role. Italy relies on the Colleferro and Anagni sites for a significant share of its domestic ammunition production. How long the facility remains offline — and whether any production can shift to the Anagni plant — is not yet clear.
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