Central Industrial Security Force (CISF) personnel seized Rs 1.2 crore in banned currency notes from a Thai national at the Patna airport on Thursday evening.
The passenger, Suwachai Parithan, had flew into Patna from Lucknow by an IndiGo flight (6E 342, Del-Luk-Patna-Kol).
The passenger has been detained and the money handed over to income tax officials. I-T officials were on the job when reports last came in.
The CISF had received intelligence inputs from their counterparts at Lucknow airport and acted swiftly when the IndiGo flight landed here in the evening.
Sources said the passenger has claimed that the money was of donation and belonged to a Buddhist organisation.
This is the first such seizure of banned currency after demonetisation in Patna.