New Delhi, March 7 -- The Narcotics Control Bureau (NCB) busted an international narcotics trafficking network operating across Nepal, India and Sri Lanka and seized over 77kg of hashish oil, the agency said on Friday, adding that five people have been arrested. NCB's Chennai and Hyderabad zonal units jointly conducted the operation after receiving intelligence about a cross-border drug supply chain that moved contraband from Nepal through India to Sri Lanka via sea routes. Officials said the breakthrough came on March 3, when officers from the Hyderabad Zonal Unit intercepted a car near Raikal Toll Plaza on the Bengaluru-Hyderabad highway in Telangana. During a search of the vehicle, officers found 2kg charas concealed inside specially fabricated cavities. Two people were arrested for transporting the contraband. "Preliminary investigation revealed that the seized charas was part of a larger consignment that included around 78kg of hashish which had been delivered in Thoothukudi for onward trafficking to Sri Lanka," a spokesperson said. He added that acting on this lead, the NCB's Chennai Zonal Unit conducted an operation in Thoothukudi and seized the hashish oil and arrested three people, including a Sri Lankan refugee....