Defence Intelligence of Ukraine agents attacked an industrial power substation in the Russian city of Kaliningrad at around 04:00 on 14 June, resulting in a complete cut-off of electricity supply to consumers, including to Russian defence industrial base facilities and the Russian Armed Forces located nearby. 

Source:Ukrainska Pravda source in Defence Intelligence of Ukraine

Details: Sources say that Ukrainian intelligence agents drained the coolant from the substation's power transformer and then set it on fire.

The source said the losses to Russia as a result of the sabotage amounted to almost US$5 million.

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