Chandigarh: In a major blow to Pakistan’s ISI-backed trans-border drug trafficking module, Punjab Police’s Anti-Narcotics Task Force (ANTF) has arrested a drug smuggler and recovered 50 kg heroin from his possession, said Director General of Police (DGP) Gaurav Yadav here on Saturday. The accused has been identified as Sandeep Singh, alias Seepa, a resident of.