Sanctions against Russia’s key energy companies would inevitably lead to a collapse of the European energy sector, BP CEO Bob Dudley has warned, according to Sputnik news agency. “I do not think that would happen. If sanctions were put on Rosneft or Gazprom or LUKoil like what happened with Rusal, you would virtually shut down the energy systems of Europe, it is a bit of extreme thing to happen. We invest in Russia carefully, not just in Rosneft,” Dudley told the Oil & Money conference in London.