The incident occurred last night when BSF patrolling troops noticed a handful Pakistani smugglers moving on Indian sides and throwing contraband to the village field of Mahawa, a senior BSF official said today.
On being challenged, Pakistani smugglers fired gun shots on the BSF party, whereupon BSF retaliated and all the Pakistani intruders escaped back to their country.
A search operation was launched today, whereupon 4 kg of heroin and one loaded Chinese pistol were recovered from the spot.
BSF is trying to identify the Indian smuggler for whom consignment was smuggled from Pakistan to India so that he could be arrested.