The person has been identified as one Sumit Singh who was detained by the Central Industrial Security Force sleuths while he was about to take a flight from Agartala to Kolkata in the evening.
CISF Additional Director General (Airport security) in Delhi O P Singh told PTI that the person was questioned.
Officials said the executive of the firm was allowed to take his flight under detention and he is being currently interrogated by officials at Kolkata airport.
CISF, along with other agencies, has stepped up surveillance at airports in view of the forthcoming polls in various states of the country.
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