Troops at the D T Mal border post saw suspicious movement along the International Border and challenged the smugglers, BSF DIG R S Kataria said.
"Unfazed by the repeated warnings, the smugglers opened fire on the post. They fled the area after BSF personnel retaliated," he said.
Later, while conducting a search, BSF troopers recovered 133 packets of the contraband, which is worth Rs 40 crore in the international market, the DIG said.