Homemade charges were found at a substation near Jänschwalde, which is one of Germany's largest coal-fired power plants in the state of Brandenburg.
German police believe a power line may have been damaged. Bomb disposal experts are working at the scene in the municipality of Turnow-Preilack. According to media reports, the station also appears to have been hit with some kind of rocket.
The operator 50 Hertz reports only a minor disruption in the power supply. The authorities suspect that the intention was to cause a large-scale outage.
The power plant is powered by lignite and is being phased out, but operations will continue until 2028. It was previously owned by the state-owned Swedish utility Vattenfall.
Several suspected attacks have been detected in Germany in recent weeks, including the discovery of armed drones around Leipzig Airport. The German federal government has stated that the country is the target of escalating hybrid warfare by an increasingly aggressive party or its proxies. The government is expected to name a person responsible for the matter shortly.
In January this year, an arson attack on power lines in Berlin caused a major power outage, leaving around 45,000 households without power for several days. A far-left group claimed responsibility for the incident.
Corrected: In a previous version of this text, there was incorrect information about the power plant's ownership.
