Ailing Cuban leader Fidel Castro is in "very grave" condition after three failed operations and complications from an intestinal infection known as diverticulitis, a Spanish newspaper said Tuesday. The newspaper El Pais cited two unnamed sources from the Gregorio Maranon hospital in the Spanish capital of Madrid. The facility employs surgeon Jose Luis Garcia Sabrido, who flew to Cuba in December to treat the 80-year-old Castro. In a report published on its Web site, El Pais said, "A grave infection in the large intestine, at least three failed operations and various complications have left the Cuban dictator, Fidel Castro, laid up with a very grave prognosis." El Pais said that in December, when Garcia Sabrido visited, Castro had an abdominal wound that was leaking more than half a liter (1 pint) a of fluids a day, causing "'a severe loss of nutrients." The Cuban leader was being fed intraveneously, the report said.