Hundreds of anti-riot police entered a maximum security prison in Guatemala early Sunday to free guards who had been taken hostage and retake control of the facility that houses gang leaders.Shots sounded as police swept into the Renovation prison, about 47 miles (76 kilometers) southwest of Guatemala City. About 15 minutes later, an Associated Press journalist saw guards being escorted from the prison. They appeared to be unharmed. No injuries or deaths were immediately reported.Guatemala’s Interior Minister Marco Antonio Villeda said Saturday night that nine guards were taken hostage in the prison. Some three dozen other guards were being held...