"A lion cub who grew to become a respected revolutionary leader in a small country, Fidel Castro is one of the greatest leaders I can never forget," he said in a statement here.
Condoling Castro's death, the 93-year old Karunanidhi expressed his sympathies with the people of Cuba and supporters of the former Cuban president all over the world.
He also recalled a poem 'presented' by him during an event to commemorate the Cuban revolution here a few years ago and hailed Castro's leadership.
Castro had ushered in lot of people-oriented welfare measures and had defied the US on many occasions, he said.
The Cuban leader died in Havana yesterday aged 90.
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