At least one of the intruders was killed during the cross-firing while the other managed to escape in the dense fog and return to Pakistani territory.
BSF personnel, however, recovered 5.5 kilograms of heroin worth over Rs 25 crore, China made automatic pistol and counterfeit Indian currency of two million rupees.
The counterfeit notes of Rs 500 and Rs 1,000 were packed in a suitcase and the heroin had been packed in six packets.
According to Additional Deputy Inspector General Jagir Singh, on noticing some movement, the security personnel gave repeated warning. But when the smugglers refused to surrender.
The BSF personnel opened fire and killed one of smugglers on the spot. However, the other one escaped.
He said that as per the preliminary enquiry it seems to be a smuggling attempt.