The value of the seized gold has been estimated at Rs 5.5 crore and customs authorities have detained all of them, a CISF spokesman said.
The incident occured in the wee hours when a Central Industrial Security Force officer noticed suspect dealings of a passenger with an airport staffer on the CCTV camera soon after an international flight from Doha landed, he said.
The CISF officer, officials said, saw the arriving passenger handing over a packet to the airport staffer.
"A packet containing 19.5kg gold was recovered from Manotgi. On his directions, the passenger, along with two others who handed over the consignment to him, was apprehended and customs officials were informed," the spokesperson said.
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The three passengers, identified as A Mohammed, I Hussain and M Mohammed, are being questioned as to how such a huge quantity of gold was brought by them without declaring it to the authorities in Doha.
The passengers hail from Maharashtra and Karnataka.