Swamy said he also brought to the President's attention the "spate of murders of leaders" belonging to various Hindu organisations in Tamil Nadu in the last two months.
The BJP leader said he told Mukherjee that ISI-trained Sri Lankan Tamils have infiltrated heavily into Tamil Nadu and sought direction to the state government to take effective steps to deal with it.
"Recently Tamil Muslims have even joined the Caliphate ISIS in Iraq. Hence a direction should be sent to the Tamil Nadu government under Article 256 of the Constitution to take effective steps to check this," Swamy said in the statement.