The BMC vigilance department arrested two persons Friday for trying to evade octroi on diamonds worth Rs 27 crore.
Officials said the two reached CST by Jaipur- Mumbai Express.
The vigilance department had laid a trap after receiving a tip that an attempt to smuggle diamonds would be made.
At 7.50 am,officials spotted several bags being loaded into a vehicle parked outside the station and searched.
The diamonds were seized and a penalty of Rs 2.99 lakh imposed on the accused.