Indian Prime Minister Narendra Modi on Saturday described South Africa's anti-apartheid icon Nelson Mandela as a "shining beacon of democracy".

"Remembering the apostle of peace, a shining beacon of democracy and a champion of equality, the beloved Madiba on Nelson Mandela Day," Modi said.

The Indian prime minister was paying tribute to the late South African president on the occasion of his birth anniversary.

Mandela's birthday on July 18 was declared by the United Nations in 2009 as Nelson Mandela International Day in recognition of his contribution to peace and freedom.