Spain's Enagas and Canadian pension fund Omers agreed to sell their holdings in Chile's GNL Quintero, which represent an 80% stake, to Belgian gas utility Fluxys and investment fund EIG, Enagas said on Monday. The Spanish gas pipeline operator which owns 45.4% in GNL Quintero, said it sold its stake for $661 million and said the sale was part of a wider strategic plan to "rotate" assets.