India, Nov. 23 -- Prime Minister Narendra Modi on Sunday said the reform of the UN Security Council was no longer an option, but a necessity and asserted that the India-Brazil-South Africa troika should send a clear message for changes to institutions of global governance.

Addressing the India-Brazil-South Africa (IBSA) leaders summit here, Modi said at a time when the world appears fragmented and divided, IBSA can provide a message of unity, cooperation, and humanity.

He also proposed institutionalising the IBSA NSA-level meeting to strengthen security cooperation among the three countries.

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