Fidel Castro stepping down as Cuba's leader

Castro, 81, said in a statement to the country that he would not seek a new presidential term when the National Assembly meets on February 24.

"To my dear compatriots, who gave me the immense honor in recent days of electing me a member of parliament ... I communicate to you that I will not aspire to or accept -- I repeat not aspire to or accept -- the positions of President of Council of State and Commander in Chief," Castro said in the statement published on the Web site of the Communist Party's Granma newspaper.

The National Assembly or legislature is expected to nominate his brother and designated successor Raul Castro, 76, as president in place of Castro, who has not appeared in public for almost 19 months after being stricken by an undisclosed illness.

The title of "Comandante en Jefe" or commander-in-chief, was created for him in 1958 as the leader of a guerrilla movement that swept down from the mountains of eastern Cuba to overthrow US-backed dictator Fulgencio Batista.

Castro's retirement draws the curtain on a political career that spanned the Cold War and survived US enmity, CIA assassination attempts and the demise of Soviet Communism.

A charismatic leader famous for his long speeches delivered in his green military fatigues, Castro is admired in the Third World for standing up to the United States but considered by his opponents a tyrant who suppressed freedom.

His illness and departure from Cuba's helm have raised doubts about the future of the Western Hemisphere's only communist state.

"Fortunately, our Revolution can still count on cadres from the old guard and others who were very young in the early stages of the process," Castro said in his statement.

"They have the authority and the experience to guarantee the replacement," he said.

The bearded leader who took power in an armed uprising against a U.S.-backed dictator in 1959 had temporarily ceded power to his younger brother after he underwent emergency surgery to stop intestinal bleeding in mid-2006.

Castro has only been seen in pictures since then, looking gaunt and frail, though his health improved enough a year ago to allow him to keep in the public mind writing reams of articles published by Cuba's state press.

"This is not my farewell to you. My only wish is to fight as a soldier in the battle of ideas. I shall continue to write under the heading of 'Reflections by comrade Fidel.' It will be just another weapon you can count on. Perhaps my voice will be heard. I shall be careful," Castro said.

Castro could remain politically influential as first secretary of the ruling Communist Party and elder statesman.