Students from the University of Havana gather outside their school to pay tribute to the leader of the Cuban Revolution, Fidel Castro, in Havana, Cuba, Nov 26, 2016. Aged 90, Castro passed away late Friday night. [Photo/Xinhua]

Bolivian President Evo Morales called Castro "a giant of history and humanity."

On Saturday morning, Ecuadorian President Rafael Correa took to Twitter to lament the death of a close political ally. "A great man is gone. Fidel has died! Long live Cuba! Long live Latin America!" he wrote.

Former Uruguayan President Jose Mujica on Saturday highlighted Fidel Castro's courage, saying he was "someone who lived as he thought."

Condolences also came from Western countries.

Canadian Prime Minister Justin Trudeau remembered Fidel Castro Saturday as a "remarkable leader" who will be mourned by Canada.

"Fidel Castro was a larger-than-life leader who served his people for almost half a century," Trudeau said in a statement. "A legendary revolutionary and orator, Mr. Castro made significant improvements to the education and health care of his island nation."

US President Barack Obama said "history will record and judge the enormous impact of this singular figure (Fidel Castro) on the people and world around him."

French President Francois Hollande on Saturday mourned the passing Castro and paid tribute to a "major figure of the 20th century," who offered "Cubans an opportunity to be proud of freedom from foreign rule."

Portuguese President Marcelo Rebelo de Sousa also sent his condolences to Cuba on Saturday.

"On finding out that the former head of state in Cuba, Comandante Fidel Castro, has died, I want to express my sincere condolences to President Raul Castro Ruz and to the Cuban people," he said in an official statement on his website.

The United Nations (UN) also offered condolences to Cuban people and gave affirmative judgment to the revolutionary leader.