Rome: Two Anarchists Die in Suspected Bomb-Making Accident at Park

A Bomb-Making Accident at Rome's Ancient Park

Two individuals—Alessandro Mercogliano and Sara Ardizzone—died in a violent explosion at Rome's Parco degli Acquedotti on March 20. Police believe they were preparing an improvised explosive device when the device detonated. The incident has triggered a national terrorism investigation by the Rome Prosecutor's Office and the Strategic Anti-Terrorism Analysis Committee (C.a.s.a.) at the Interior Ministry.

Both victims carried documented ties to anarchist movements. Mercogliano had prior convictions for terrorism-related activities, while Ardizzone gained attention in anarchist circles for supporting imprisoned anarchist leader Alfredo Cospito during a 2024 court hearing. Investigators are now determining whether the device was intended for imminent use or represented ongoing capability-building.

Why This Matters for Romans

Police believe the explosion may have prevented a potential attack on Rome's railway infrastructure or Leonardo S.p.A., the state-controlled defense contractor. The incident raises urgent questions about security in Rome's public parks, where abandoned structures continue to attract illicit activity despite years of warnings from residents and urban planners.

The Parco degli Acquedotti remains partially closed while authorities assess other derelict buildings within the 240-hectare park. Rome's municipal government has announced a comprehensive review of park security protocols and accelerated demolition plans for dangerous abandoned structures.

What Happened at Via delle Capannelle

Emergency services arrived shortly before 9:00 AM to reports of a structural collapse at an abandoned farmhouse near Via delle Capannelle, within the archaeological park. The Rome Fire Brigade, including specialized search and rescue teams, recovered the two bodies from beneath rubble.

Initial investigation findings, according to investigators at the Polizia Scientifica, suggested evidence of an accidental explosive detonation. Mercogliano's body showed injuries inconsistent with a building collapse, while forensic teams identified chemical residue and fragmented materials at the scene consistent with bomb-making activity.

The abandoned farmhouse, known to authorities as a potential squatting site, had no electricity or legitimate reason for an explosion of this nature. Search operations continued throughout the day to rule out additional victims, while explosive ordnance disposal teams swept the area for secondary devices.

The Rome Municipal Police established a security perimeter extending 200 meters from the site, temporarily closing popular walking paths used by joggers and families.

The Victims' Anarchist Background

Alessandro Mercogliano carried prior convictions for terrorism-related activities, though specific details remain sealed under Italian anti-terrorism statutes. Sara Ardizzone became known in activist circles for publicly reading a solidarity statement for Alfredo Cospito during a 2024 Milan court hearing.

Cospito is serving multiple life sentences for kneecapping attacks and letter bombs targeting business executives and politicians. He gained international attention among radical leftist networks after beginning a hunger strike to protest his Article 41-bis prison isolation conditions.

Both victims maintained connections to informal anarchist collectives operating in central Italy. Italian domestic intelligence services have monitored these networks closely following a wave of incendiary attacks targeting Leonardo facilities and logistics centers in 2024 and 2025.

What Investigators Are Exploring

Police are examining two primary hypotheses for the intended target, according to the Digos anti-terrorism unit.

The first focuses on Rome's rail network, particularly high-speed lines connecting the capital to Milan and Naples. Anarchist messaging has historically framed railways as symbols of capitalist infrastructure and state control. The farmhouse location, less than 2 kilometers from the Rome-Naples line, is consistent with this theory.

The second hypothesis centers on Leonardo S.p.A. The company operates major facilities in Rome's industrial areas, manufacturing military electronics and weapons systems. Anarchist groups have publicly condemned Leonardo's role in arms exports and NATO partnerships. A 2024 communiqué claiming responsibility for an arson attack on a Leonardo subcontractor explicitly called the company a "merchant of death."

Police have not ruled out the possibility that both targets were under consideration or that the device represented preparation for a broader campaign.

What Residents Should Know

Park Safety: The Parco degli Acquedotti remains partially closed. Rome's municipal authority advises residents to avoid cordoned areas and report any suspicious activity to police. The park is expected to remain partially restricted for several weeks during structural assessments of other buildings.

Reporting Abandoned Buildings: Residents who identify abandoned structures or suspicious activity in Rome's parks can report concerns to the Rome Municipal Police non-emergency line (06-6769) or email municipal authorities through the city website.

Park Access: Most of the Parco degli Acquedotti remains open for normal recreation. Authorities have increased Local Police presence during peak hours. Additional lighting and surveillance improvements are planned for the coming months.

The 2021 Rome Green Space and Urban Landscape Regulation requires regular safety inspections of abandoned structures on public land, but enforcement has faced delays due to budget constraints and jurisdictional disputes between city and regional authorities. This incident has prompted municipal officials to prioritize demolition of the most hazardous buildings and accelerate implementation of the regulation.

Broader Security Implications

The C.a.s.a. convened an emergency session at the Viminale (Interior Ministry headquarters) to assess whether this represents an isolated event or signals renewed organizational activity among Italy's fragmented anarchist networks. Intelligence analysts note that the last significant anarchist bombing campaign occurred in 2017-2018, targeting post offices and employment centers.

The possible connection to Cospito's imprisonment has caught official attention. His 2023 hunger strike attracted international support from anarchist networks in Greece, Chile, and Spain—some with histories of sophisticated bombing campaigns. Italian authorities remain vigilant about whether tactical knowledge and motivation could converge, particularly around significant political anniversaries.

Rome prosecutors are treating the case as involving attempted terrorism and related criminal charges, pending final forensic analysis of materials and documentary evidence recovered from the victims' residences.

Rome's Ongoing Challenge With Abandoned Buildings

Rome struggles with an estimated 400 abandoned buildings across public parks and peripheral zones—a legacy of agricultural decline and administrative delays in managing derelict property. National legislation promoting urban regeneration has advanced slowly, hampered by ownership disputes and insufficient funding.

The Parco degli Acquedotti underwent partial cleanup in 2019, when municipal crews demolished illegal structures and removed accumulated waste. Yet the park's vast expanse makes comprehensive monitoring difficult.

Urban planners emphasize that sustainable solutions require active repurposing through community programs, cultural initiatives, and authorized uses outlined in Rome's guidelines for temporary reuse of abandoned spaces. Without alternative uses, these structures attract new occupants—and, as this incident demonstrates, potentially dangerous activity.

Authorities promise a comprehensive review of security protocols for Rome's park system and renewed efforts to eliminate hazardous abandoned structures.