"Based on specific information, the officials of narcotic cell, Pune Customs yesterday raided the factory premises of M/s Samarth Laboratories in Kurkumbh MIDC area in Daund and seized 159.10 kg of mephedrone hydrochloride, worth Rs 25 crore," K Shubhendra, deputy commissioner of Customs said in a press release.
He said four people, including the mastermind of the case, who is a foreign national, and one of the directors of the firm have been apprehended.
The raids started yesterday and went on till early hours today with the officials searching the residential premises of arrested people.
All the suspects will be produced in the court tomorrow.