On August 8, 2026, an unidentified drone entered Bulgarian airspace from Romania at 8:10 a.m. local time (UTC+3) and exploded near the village of Kardam on the Bulgaria-Romania border [1, 2, 3, 4].
The explosion occurred approximately 1,000 meters from the Bulgarian compressor station of the Trans-Balkan gas pipeline, which connects Turkey and Ukraine [1, 2, 3, 4]. The drone crashed in a sunflower field close to the Kardam border crossing, near a Romanian compressor station about 200 meters away [1, 2, 3].
Bulgarian authorities reported no casualties or damage to buildings, infrastructure, or agricultural land caused by the blast [1, 2, 4]. Prime Minister Rumen Radev said the drone carried a significant amount of explosives, noting, "One thing is certain: the drone was carrying a significant amount of explosives, given that it could be heard from a distance and produced such black smoke" [1].
The drone was large enough to be more than a hobby model, but Bulgarian officials have not confirmed its exact type or origin [1, 2]. Bulgaria’s defense ministry said it was a type widely used by the Ukrainian military; however, Ukraine denied intentionally targeting Bulgaria. Kyiv's foreign ministry spokesman Georgiy Tykhyi said, "We can say with certainty that the Ukrainian Armed Forces did not intentionally direct any assets toward Bulgaria" and confirmed cooperation with Bulgarian authorities to clarify the incident [3]. In response, the Bulgarian foreign minister summoned the Ukrainian ambassador for a meeting on August 10 or 11 [3].
Bulgarian Prime Minister Radev stated that neither Bulgarian nor Romanian air defenses or NATO radar detected the drone before it exploded. He added, "When flying at low altitude, it is not possible to ensure sufficiently dense radar coverage," citing delays in delivery of high-precision radars to Bulgaria’s army [1, 2, 4]. NATO’s Combined Air Operations Center in Spain also did not provide any information on the drone prior to the explosion [4].
Officials noted that drone incursions have increased in Eastern Europe amid the Russia-Ukraine war, raising NATO security concerns [1, 2, 3]. Bulgaria said it plans to strengthen security around strategic sites and improve border surveillance after the incident [2].
