Prime Minister Narendra Modi reminisced about his days spent with the former President.
Sri Lankan President Maithripala Sirisena also expressed his condolences.
Bhutan Prime Minister too joined in the mourning.
Celebrities from the Hindi film fraternity also took to Twitter to express their grief.
Rajasthan CM Vasundhara Raje also shared her sadness over Kalam’s death.
Among others, former cricketer Sunil Gavaskar and spiritual leader Sri Sri Ravi Shankar shared their condolences.
Srijan Pal Singh who has worked with Kalam in 2009 and also co-authored a book with him shared an old picture of Kalam giving lecture to children.
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