BSF troopers on Sunday shot dead four smugglers, including two Pakistanis, in the Khemkaran sector of Punjab's Tarn Taran district and seized nearly 10 kg heroin, officials said.
The Border Security Force troopers also seized arms and ammunition from the encounter spot.
A search of the area, about 300 km from Chandigarh, later led to the seizure of the contraband.
