India, Nov. 23 -- The Delhi Police Crime Branch on Saturday uncovered a Pakistan-based arms-smuggling operation backed by the Inter-Services Intelligence (ISI), following the seizure of high-quality pistols manufactured in Turkey and China that were headed for gangs operating across Delhi-NCR, officials said. According to the investigators, the weapons were being pushed into India using drones flown from across the border with Pakistan.

Police have arrested four alleged smugglers-identified as Mandeep, Ajay, Dalwinder and Rohan-who belong to different districts of Punjab and Uttar Pradesh. Officials said the arrests opened up a wider probe into how many consignments may have already slipped into the country through this channel and which...