Two suspected arm smugglers were arrested in this connection last evening, the police said.
The seized arms included ten modified assault rifles along with 20 magazines, four Chinese-made rifles along with eight magazines, a light machine gun, 39 grenade shells, one pistol, one telescope used for rifles, a pistol silencer and 532 rounds of live ammunition.
The arms were seized from a truck at a place between Chekkawn and Khawlailung villages on Monday.
Two suspects - Thangdeihtung (30), driver of the truck and Liankhanmang (30), both belonging to the Champai town bordering Myanmar were arrested and booked under relevant sections of the IPC, police added.