German sources and Russian authorities said they were not ruling out an act of sabotage after three leaks were discovered on the Nord Stream pipelines that carry gas from Russia to Europe via the Baltic Sea. German security sources told dpa the cause of the incidents had not been clarified, but there were indications of sabotage. Only a state actor could mount such an intervention due to its technical complexity, the sources said. The Kremlin also reacted to the discovery of the leaks by saying that an act of sabotage could not be ruled out. “Obviously, there is a destruction of the pipeline. …