"The passenger was intercepted at the departure hall and was interrogated. The substance in the form of crystal powdery substance was tested by the customs officer and was found positive for amphetamine," said Neeta Lall Butalia, commissioner of customs (I&G).
The 2.9kg consignment had been concealed in the false cavity of the bag and the value of it is estimated to be over R16 crore.
Sinaga reached the airport at 8pm on Saturday. He was to travel to Kuala Lumpur by flight number MH-191 of Malaysian Airlines.
Sinaga is a student and had come to India on January 23 on a tourist visa, which was valid till February 5.