Fidel Castro, Cuba's former president and leader of the Communist revolution, has died aged 90, his brother has said.
"The commander in chief of the Cuban revolution died at 22:29 hours this evening (03:29 GMT Saturday),"President Raul Castro said.
Fidel Castro ruled Cuba as a one-party state for almost 50 years before Raul took over in 2008.
His supporters said he had given Cuba back to the people. But he was also accused of suppressing opposition
Ashen and grave, President Castro told the nation in an unexpected late night broadcast on state television that Fidel Castro had died and would be cremated later on Saturday.
There would now be several days of national mourning on the island.
Raul Castro ended the announcement by shouting the revolutionary slogan: "Towards victory, always!"
Barring the occasional newspaper column, Fidel Castro had essentially been retired from political life for some time, the BBC's Will Grant in Havana reports.
Castro - who had survived many assassination plots - was the longest serving non-royal leader of the 20th Century.
Castro temporarily handed over power to his brother in 2006 as he was recovering from an acute intestinal ailment.
Raul Castro officially became president two years later.
Throughout the Cold War, Fidel Castro was Washington's bete noire.
An accomplished tactician on the battlefield, he and his small army of guerrillas overthrew the military leader Fulgencio Batista in 1959 to widespread popular support.
Within two years of taking power, he declared the revolution to be Marxist-Leninist in nature and allied the island nation firmly to the Soviet Union.
Yet, despite the constant threat of a US invasion as well as the long-standing economic embargo on the island, Castro managed to maintain a communist revolution in a nation just 90 miles (145km) off the coast of Florida.
Despised by his critics as much as he was revered by his followers, he outlasted ten US presidents and defied scores of attempts on his life by the CIA.
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