It said the NIA had earlier re-registered the case probed by the Special Cell (SB), New Delhi.
"Kandy was arrested on July 01, 2017 at the IGI airport, New Delhi, on his deportation by the Turkish authorities. He is an ISIS operative who had gone to Turkey/Syria for carrying out terrorist activities after procuring an Indian passport in the fake name," the agency said.
Kandy (32), from Kannur in Kerala, was arrested by the Special Cell of the Delhi Police after it received information from Turkey's police about his deportation, said Pramod Singh Kushwah, Deputy Commissioner of Police (Special Cell) had said.
His wife was also sent back to India.
The police had said he procured a fake passport using the services of an agent from Chennai. In the fake documents, he was identified as Mohammad Ismail, 35, the officer said.
He travelled alone to Turkey in March and made an attempt to cross over to Syria in June, but was deported to India again, he added.
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