A far-left activist group in Germany, called Vulkangruppe, claimed they caused a fire that cut electricity to about 45,000 homes and 2,200 businesses in Berlin. The fire happened early Saturday on cables near a power plant in south-west Berlin. The fire was quickly put out but left many without power in freezing weather. The group said the attack targeted the fossil fuel economy, not the power itself. They called it an "act of self-defence" and showed solidarity with those who protect the earth. Vulkangruppe apologized to poorer residents but expressed less sympathy for wealthy villa owners. Berlin’s state economy minister told media the damage was caused by incendiary devices. Berlin’s mayor condemned the attack, blaming "suspected left-wing extremists" for risking lives, especially patients in hospitals. Hospitals and care facilities used emergency generators. Authorities moved some patients to safer facilities with available capacity. By Sunday, some hospitals had power again. Around 10,000 households and 300 businesses regained electricity, but many remained without power. Many schools that were to reopen after holidays on Monday stayed closed. The city’s electricity operator said full power restoration will take until Thursday. Police said the group's claim of responsibility seemed "plausible" and are still investigating. Vulkangruppe had previously admitted to a fire that stopped Tesla's Berlin factory production in 2024.