Acting on a tip off that some narcotic substances were smuggled from New Delhi to Chennai by a gang in train, the officials intercepted two passengers at the Chennai Central Railway Station last night, a release from DRI said.
"The passengers confessed that the narcotics were procured from New Delhi and were carried in their respective suitcases for exports. The drug was found to be Amphetamine and was valued at Rs 2.51 crore," it said.
"With the total seizure of 25.16 kgs of Amphetamine, 32.85 lakh tablets of Zolpidem, the goods valued at Rs three crore in international market."
The four persons -- Kader Mohideen Mohammed Ali Jinna, Jahir Hussain, Syed Ibrahim and Shahul Hameed were arrested yesterday and were remanded to judicial custody under the Narcotic Drugs and Psychotropic Substances Act, 1985.