Kathmandu— A series of unidentified drone sightings and an explosion near critical infrastructure in Bulgaria and Germany have sparked fears that Russia's ongoing war in Ukraine is increasingly entangling NATO member states. The incidents, which include a drone explosion near a major gas pipeline in Bulgaria and sightings at a German military base and logistics hub, have prompted investigations and heightened debates regarding the readiness of European nations to face new security threats.

Explosion Near Critical Gas Infrastructure

A drone exploded near the Romanian border in Bulgaria, specifically in the immediate vicinity of the Kardam border crossing. Bulgarian Prime Minister Rumen Radev reported that the incident occurred approximately one kilometre from a compressor station on the Trans-Balkan gas pipeline, a vital link connecting Turkiye to Ukraine.

While the explosion took place near such sensitive energy infrastructure, Radev confirmed that there were no casualties resulting from the blast.

Security Breaches in Germany

In Germany, military personnel and police are investigating two drones spotted Thursday night at a military base in Mechernich, located in North Rhine-Westphalia. The site, situated roughly 35km from the Belgian border, serves as a high-security underground storage facility for military hardware and is a base for personnel responsible for maintaining US Patriot air defense systems.

In a separate incident, a drone was discovered late Tuesday at Leipzig/Halle Airport. The airport serves as a significant civilian freight and NATO logistics hub, and the drone was found near several Ukrainian Antonov An-124 cargo airplanes.

Geopolitical Tensions and NATO Response

The surge in drone activity has revived concerns that Moscow's conflict in Ukraine is expanding its reach into neighboring NATO territories. While German government officials have not publicly blamed a specific foreign power for this week's incidents, some politicians have accused Russia, which invaded Ukraine in 2022.

NATO and European Union officials have previously blamed Russia for similar sightings. NATO chief Mark Rutte has characterized Moscow's actions as "reckless behaviour" that poses a danger to all. In response to these growing threats, United States ambassador to NATO Matthew Whitaker has pledged that the alliance will "defend every inch" of its territory.

Russian Denials

Russia has consistently rejected accusations regarding drone incursions. Following the incident at Leipzig/Halle Airport, the Russian embassy in Berlin dismissed the event as a "fabricated provocation," claiming it represents another instance of accusations being leveled against Russia without supporting evidence.

Investigations into the German drone sightings are ongoing as the alliance continues to monitor its airspace.

(With inputs from Al Jazeera)

Originally published on abcnews.com.np.