Ramón Castro Ruz

Agustina del Carmen Castro Ruz, the youngest sibling of Fidel and Raul Castro, has died in Cuba. She was 78.

Agustina Castro died Sunday at a hospital in Havana due to complications from a recent surgery following a fractured hip, sister Juanita Castro said.

She told The Associated Press that Agustina had been in poor health for more than a year.

Fidel Castro, the Cuban revolutionary leader who built a communist state on the doorstep of the United States and for five decades defied U.S. efforts to topple him, died on Friday, his younger brother announced to the nation. He was 90.