German police are investigating a series of incidents involving electrical infrastructure, including fires and explosions, across the country. A 48-year-old man named Daniel V. has been identified as a suspect after sending a letter claiming responsibility for some of the attacks. The incidents include a fire at a power station in Berlin on September 7, which damaged a construction site and part of the facility. Authorities are currently determining whether the fire was the result of a criminal act or a technical failure. On Thursday evening, an unusual object was discovered near a transformer station in Dormagen, North Rhine-Westphalia. The object did not cause any damage and was secured by local police. Two days prior, a short circuit occurred in Bergheim, North Rhine-Westphalia, leading to the failure of several power lines, though there were no power outages. Officials are not considering this a technical failure, but rather a deliberate act. In the eastern part of Germany, an improvised explosive device detonated near an electrical station in Turnow-Preilack on Tuesday night, damaging several lines and briefly cutting power. Explosive devices were found at a power station distributing electricity from the Jänschwalde power plant the following morning, with at least one device exploding. Authorities are treating the incident with high seriousness. Interior Minister Herbert Reul of North Rhine-Westphalia has stated that authorities are looking into a possible link between the incidents in Bergheim and Jänschwalde. Police in Cologne noted similar evidence suggesting that pyrotechnic devices were used at both sites. The investigation also includes sabotage attempts in Saxony, where nine explosive devices were discovered and disarmed near high-voltage lines on Sunday, and twelve more devices were found in Lusatia the day before, intended to cause short circuits on high-voltage lines. Daniel V., from Gevelsberg, North Rhine-Westphalia, sent a letter linking the attack in Jänschwalde, Brandenburg, and those in North Rhine-Westphalia. He cited motivations including opposition to fossil fuels and hindering the production of German arms exported to Israel due to the "genocide in Palestine." The investigation is considering motives of left-wing extremism and possible foreign state sabotage, with the possibility of climate extremism. During a search of the suspect's residence, police found suspicious substances, including potassium nitrate and potassium perchlorate, which are commonly used in explosives. Searches were also conducted in the Hambach forest near Cologne and a wooded area in the Berg region. Recent attacks on Germany's electrical infrastructure include a criminal fire at an installation in January, claimed by the group "Vulkangruppe," which left over 100,000 people without power in Berlin. The investigation into that incident is ongoing. Germany has increased its vigilance regarding critical infrastructure due to alleged sabotage and espionage by Russia, including an accusation of sending a drone with explosives to Leipzig airport. Germany has closed the last Russian consulate in Bonn and the Russian cultural center in Berlin. Incendiary devices were also launched from a car onto buildings in Munich, where several defense companies are located. One device was extinguished by police, and another was disarmed. Two Bulgarian suspects were arrested at a gas station.