Brussels, 05/09/2007 (Agence Europe) - The Commission has expressed concern about the open conflict between Spanish energy companies, Repsol YPF and Gas Natural, and the Algerian state-owned company, Sonatrach, further to the latter's announcement that a contract on natural gas exploitation in Algeria, signed by the Spanish firms, has been cancelled. “There is good reason for concern”, said Ferran Tarradellas, spokesman for Energy Commissioner Andris Piebalgs, on Tuesday. “We are...