Top European officials believe Russia may not be to blame for acts of sabotage that severely damaged undersea pipelines built to carry natural gas from Russia to Europe. That’s according to The Washington Post, which cited interviews with 23 diplomatic and intelligence officials from nine European countries about the September explosions that led to the closure of the Nord Stream pipelines. The officials privately said there is no evidence that Russia was behind the sabotage, which caused some of the worst methane gas leaks in history and cut off supplies of Russian fuel to Europe ahead of winter. On Wednesday, a Kremlin spokesperson said European countries were failing to conduct a proper investigation. Russia has blamed the U.K. for the explosions, a charge denied by British officials.