MIAMI (AP) — A sibling of Cuban leaders Fidel and Raul Castro says their 88-year-old sister Angela Castro has died in Havana following a long illness.Juanita Castro told The Associated Press from her home in Miami that her elder sister died Tuesday after living with Alzheimer's disease for many years. Angela Castro was one of seven children.The Cuban government did not immediately comment on the news Wednesday.Juanita Castro says her sister died at a clinic in Havana where she had been staying for some time. She says Angela Castro was unconscious and surrounded by her children at the time of her death, and that her body was cremated.Fidel Castro is now 85 years old; Raul is 80.-------Associated Press writer Andrea Rodriguez in Havana contributed to this report.