Saheb Ahmed, a resident of Brahmanbaria in the neighbouring country, is being interrogated to find out if he has any terror link, the sources said.
Ahmed landed in the NSCBI Airport here yesterday night and he was supposed to catch a flight for Bengaluru, the sources said.
Security personnel accosted him on suspicion and found that he was carrying a Bangladeshi passport but his India visa has expired.
On the fake Aadhaar card, Ahmed told his interrogators that he procured it from Aizawl, the sources said.
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