Four people, two males and two females were arrested by West Bengal CID near New Alipurduar railway station for possessing Ganja and old high denomination notes.
They were taken to New Alipuarduar GRP for interrogation.
They were about to board the Delhi-bound Avadh Assam Express.
Higher denomination banned notes worth Rs 10,000 and 40 kgs of Ganja were seized from them.
"The CID officers acted on a tip off and arrested them," New Alipurduar GRP said.