The combined team of security forces acting on intelligence input cordoned off Uyel Terapokpi village since early morning and conducted search operations, police said.
The seizure of the huge cache of arms and ammunitions were made at about 6.30 a m from near a bush close to a culvert, they said.
The combined team of BSF and police recovered one grenade launcher, four grenade launcher shells, two 9 mm pistols, 3 TNT cakes, six gelatine sticks, 56 cartridges of AK-47 rifles, hand grenade, one rocket shell, one detonator, four detonator fuses, three fuse wires and nails, the police added.