Security agencies identified the person as one C Laltalnpuia (20) hailing from Manipur.
He was scheduled to board a flight to Guwahati when he was intercepted by a CISF check squad at the Terminal-3 of the IGIA at around 11 AM.
The suspicious movement of the passenger led the CISF personnel to subject him to etailed frisking which led to the recovery of 16 kg tablets of pseudoephedrine, a popular narcotic stimulant, from his bag, a senior official said.
The passenger informed the security personnel that he resides with his wife in Janakpuri area of national capital and that he was a student of the Delhi University.
"He informed the agencies that an agent gave him Rs 20,000 to do the job including to and fro tickets between Delhi and Guwahati. He was told to hand over the contraband to another person in Guwahati," the official said.
The CISF has handed over the person to the Customs department and they are now following the leads in the case, they said.
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This is the fourth incident in the last one month of drug haul by Central Industrial Security Force (CISF) at the IGIA.
The force, since October, has recovered 177 kgs of narcotic drugs even as it has deployed special teams of its personnel to keep a check on these illegal items.