India, Aug. 15 -- Prime Minister Narendra Modi on Thursday used his Independence Day address from the Red Fort to flag a concern and issue a sharp warning about what he described as a "well-planned conspiracy" aimed at changing India's demographic composition.

"I want to alert the nation about a concern and a challenge," Modi said, addressing the country on its 79th Independence Day. "Under a deliberate conspiracy, seeds of a new crisis are being sown to alter the demography of the country. Infiltrators are snatching away the livelihoods of our youth and targeting our sisters and daughters. This will not be tolerated." Follow Independence Day LIVE updates

The Prime Minister alleged that such infiltrators were also "encroaching on the la...