Ukrainian intelligence operatives destroyed an electrical substation in the Russian exclave of Kaliningrad on 14 June, cutting power to military and industrial facilities in the surrounding area.

The HUR carried out the operation at approximately 4 a.m. local time. Agents drained cooling fluid from a power transformer at the industrial substation before igniting it, sources told the Ukrainian news outlets Hromadske and Ukrainska Pravda.

The resulting fire damaged the transformer and disrupted electricity supply to nearby Russian enterprises, including facilities belonging to the country’s military-industrial complex and armed forces. A HUR source estimated the financial damage from the sabotage at nearly $5 million.

“Russia no longer has a rear, neither in the east, nor in the west, nor at any point on the planet. Russian assets involved in the war against Ukraine will burn, sink and be destroyed regardless of protection level or location,” the HUR source said, according to Hromadske.

Neither Russian authorities nor local officials have publicly confirmed the power outage or provided details about the incident’s impact on regional infrastructure.

On 1 June, Ukraine also conducted a surprise drone operation, called Spiderweb, destroying or damaging  41 Russian military planes on four key airfields, with damage estimated at over $7 billion. It involved launching 117 first-person view (FPV) drones that were smuggled into Russia and hidden in trucks. The operation took 18 months to plan and execute.