The far-left ‘Volcano’ extremist group claimed responsibility for the January 3, 2026 arson attack on a power station which affected 45,000 residences, shut down mobile phone connections, cut heating during freezing weather, stopped trains and forced hospitals to switch to back-up generators.

Berlin’s mayor said on Monday January 5, 2026, that the German capital’s core infrastructure needed better protection.

Vulkangruppe, or Volcano Group, a left-wing extremist group based in Germany responsible for previous sabotage and destruction against energy infrastructure and manufacturing, has claimed several attacks in Berlin and the neighbouring Brandenburg region.

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Reuters: Berlin mayor warns on infrastructure after power station attack