A search operation was conducted in the restive Bara area of the Khyber Agency bordering Afghanistan, he said.
The explosive materials and weapons were hidden in caves in the mountainous areas of Khyber Agency, according to Frontier Corps (FC) - a provincial auxiliary force of Pakistan.
Suicide jackets, batteries and rockets, 1,200 kg explosives, 500 IEDs and uniforms of security personnel besides flags of the militant organisation Lashkar-e-Islam were recovered by the forces, the official added.