Acting on a tip-off, the officials of the customs department seized the drugs, packed in 58 cartons, consignd by a Delhi-based goods transport company in a truck to Guwahati before being sent to Mizoram from where it would have been smuggled to neighbouring Myanmar, the officials said.
The seized drugs include 1174 kgs of pseudo ephedrine tablets in raw form and 101.56 kgs of pseudo ephedrine in crystal form.
The drugs were to be smuggled to Myanmar for manufacturing Amphetamine Type Stimulants (ATS), sources said.
Two persons were arrested in this connection and the truck was seized.