An unidentified drone exploded in Bulgaria on Saturday, close to the border with Romania, according to officials. The incident occurred near a compressor station of the Trans-Balkan gas pipeline, roughly 1,000 metres from the former Kardam border checkpoint between the two countries.
Bulgarian Prime Minister Rumen Radev told a press conference that the drone entered Bulgarian airspace from Romania before exploding. He said Romanian border police detected the drone's noise, and a patrol from the 'General Toshevo' border police unit heard the loud explosion. Radev confirmed that the location of the explosion was immediately identified and that there were no casualties or damage to buildings or infrastructure.
Radev admitted that both Bulgarian and Romanian authorities had failed to track the drone as it traversed their airspace. He announced that increased surveillance operations would be implemented in the region in response. An investigation has been launched to determine the type of drone involved.
Strategic infrastructure at risk
According to opposition lawmaker Ivaylo Mirchev, Kardam is a key location on the Vertical Gas Corridor, a strategic route for transporting liquefied natural gas from Greece across Southeastern and Central Europe. The corridor links Greece, Bulgaria, Romania, Hungary, Slovakia, Moldova, and Ukraine, making it vital for regional energy security.
The explosion comes amid heightened tensions along NATO's eastern flank. Both Romania and Bulgaria border the Black Sea and have faced increased security challenges since Russia's full-scale invasion of Ukraine in February 2022. The incident follows a series of drone-related incidents in the region.
In late July, Romanian forces shot down three drones in their airspace over a three-day period. Romanian officials confirmed that at least one of those drones was of the Shahed-type used by Russian forces. The surge in drone incursions has heightened tensions and prompted solidarity from EU officials.
In May, a Russian drone carrying explosives crashed into an apartment block in Galați, Romania, sparking a fire on the roof and injuring two people. The following month, a Ukrainian naval drone exploded in the Romanian port of Constanta after veering off course, reportedly due to Russian electronic warfare interference.
The latest incident underscores the vulnerability of critical infrastructure to drone threats. Ukraine's drone sector has remained resilient despite political changes, and the technology's proliferation is a growing concern for European security.
European officials have warned about potential false-flag operations. Lithuania has warned that Russia may stage a false-flag drone attack on Baltic infrastructure, highlighting the broader threat to the region.
The Bulgarian government has not yet identified the drone's origin, but the proximity to the gas pipeline raises questions about potential sabotage. The Trans-Balkan pipeline is a critical piece of energy infrastructure, and any disruption could have significant consequences for regional energy supplies.
As investigations continue, local authorities are working to enhance surveillance and response capabilities. The incident serves as a reminder of the evolving security landscape in Eastern Europe, where drones have become a persistent challenge for defence forces.
In related developments, Russian drones struck a German-owned cargo ship near Odessa, though the crew was safe. The incident highlights the ongoing risks to commercial shipping in the Black Sea region.
The European Union has expressed solidarity with Bulgaria and Romania, and calls for a coordinated response to drone threats are growing. The situation remains fluid, and further details are expected as the investigation progresses.
