Officials said the Delhi zonal unit of the Narcotics Control Bureau (NCB) began trailing the woman, identified as Bolivian national Maria Laura B Zabala (24), after she arrived in Delhi on June 12 from Addis Ababa (Ethiopia) via Bolivia and Brazil.
The NCB team kept a tab on her movements and intercepted two other men yesterday who had come to meet her in Paharganj area where she was staying in a hotel.
"The men told us that they were asked by a Nigerian man based in Bolivia to pick up the consignment and hand it over to someone later," senior NCB official said,
"The three people, including the woman, have been arrested under sections of the NDPS (Narcotic Drugs and Psychotropic Substances Act). Three packets of cocaine weighing 2.5 kgs have also been seized during the operation," the official said.
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He added that the estimated value of the cocaine is about Rs 25 crore.
The two Nigerians were staying in the country using a forged passport and visa, the official claimed, adding the probe against them and in the alleged drug racket is ongoing.