The first report of explosions in Bolkhov came from the public page «Overheard in Bolkhov», indicating «damage to some objects». It was later revealed that this is the city-forming enterprise of Bolkhov — the Bolkhov Semiconductor Device Plant, which produces components for military equipment. Since May 2024, it has been under US sanctions.
The Ukrainian Telegram channel Supernova+ published footage from eyewitnesses and geolocated them, confirming the information.
Subsequently, the damage to the plant and several private houses in Bolkhov was confirmed by Governor Andrey Klychkov. «According to updated information, as a result of a massive enemy UAV attack in the city of Bolkhov, several private residential houses and the building of the Bolkhov Semiconductor Device Plant were damaged. Currently, work is underway at the incident sites to eliminate the consequences of the attack. There are no casualties», — wrote the head of the region.
The Russian Ministry of Defense reported on the attack by Ukrainian drones on the night of May 21 — the summary included 159 drones shot down. 53 drones were shot down over the Oryol region, 51 — over Bryansk, 37 — over Kursk, 6 — in the Moscow region.