The 68-year-old son of Cuba's former leader Fidel Castro has died in Havana after taking his own life, according to Cuban state media.
Fidel Ángel Castro Díaz-Balart was found on Thursday morning and is said to have suffered from depression.
The first-born son of the late president was nicknamed "Fidelito", or Little Fidel, because of the family resemblance.
He was a nuclear physicist, trained by the former Soviet Union.
"Fidel Castro Díaz-Balart, who had been treated by a group of doctors for several months due to deep depression, took his life this morning," Cuba's official newspaper Granma reported.
State television said he had been receiving medical treatment as an outpatient in recent months, following a hospital stay.
At the time of his death, he was a scientific adviser for the Cuban Council of State and he served as vice president of Cuba's Academy of Sciences.
He headed the island's nuclear programme from 1980 to 1992, before it was suspended after the Soviet Union's collapse
