The Special Task Force of Calcutta police arrested a 36-year-old biker and seized over 5kg of heroin from him on Saturday evening, said an officer.
The seized heroin is worth around Rs 25 crore in the international grey market, police said.
Tapas Ray was arrested from a spot near Captain Bheri, off EM Bypass, based on a tip-off that a man riding a motorcycle was carrying drugs.
Ray, a resident of Dubrajpur in Birbhum, used to operate as a drug peddler in Durgapur, the police said.
He was carrying the heroin in a bag tied to the back of his motorcycle. Officers said large quantities of heroin were usually seized from cars and trucks.
“This was possibly the first time that such a huge quantity of heroin was found in a bag tied to a two-wheeler,” an officer said.
“The accused wanted to hoodwink cops and chose to drive down all the way from Durgapur to Calcutta on a motorcycle,” the officer said.
The police are yet to find out who Ray was to deliver the consignment.
