Former dictator Gen. Augusto Pinochet was hospitalized early Sunday after suffering a heart attack and is in serious but stable condition, the Santiago Military Hospital said. The 91-year-old retired general, who has been under house arrest, was rushed to the hospital after suffering «an acute» heart attack and a buildup of fluid in his lungs, the hospital said in a statement. «His condition is serious but stable.» The brief statement said Pinochet was at the hospital's emergency room undergoing treatment, the Associated Press reported.