"Heartfelt condolences on sad demise of Cuba's revolutionary leader, former President and friend of India, Fidel Castro," he said in a tweet.
The communist idol, who led a rebel army to improbable victory in Cuba, embraced Soviet-style communism and defied the power of 10 US presidents during his half century rule, died at age 90.
With a shaking voice, Cuban President Raul Castro said on state television that his older brother died at 10:29 PM on Friday.
(Reopens DEL28)
Vice President M Hamid Ansari also condoled the demise of Castro.
"In his death, the people of Cuba have lost the architect of their revolution and the developing countries of the world a champion of equality and justice," Ansari said in a statement.
The Vice-president also said that Castro was a dear friend of India, and would continue to be remembered here, particularly for his role in the Non-Aligned Movement.
