The incident occurred yesterday when a CISF squad stopped the passenger, Raseeth Aaran, as the metal detector beeped when he was being frisked.
The passenger was then asked to remove his shoes and socks and after further frisking, six gold biscuits weighing 900 gm was recovered from him, a senior official said today.
The estimated value of the yellow metal pieces is about Rs 27 lakh, the official said.
Aaran, a resident of Chennai, was later handed over to the customs authorities for further action and questioning.