The official from Fort Salop in Khyber Agency, some 20 kilometres from here, on phone said that the arms were concealed under tea sacks aboard a goods truck (PRE 8866).
He said that the cache was brought in to Pakistan from Afghanistan to smuggle it down country.
The seizure of arms included two surface-to-air missiles, Russian-made 105mm rocket launchers, 107mm rockets, 82mm mortar shells, 80mm anti-tank rockets, anti-tank mines and rocket- propelled grenades, he said and added that the smugglers escaped after a brief exchange of fire.
The FC also seized 632 kilogramme hashish and 896 kilogramme green tea.
The political administration of the Khyber Agency has registered a case and initiated an inquiry.