The police have seized Ketamine valued at Rs 88.92 crore from a factory in Maharashtra's Raigad district, and arrested four persons allegedly involved in its production, an official said on Thursday, reported news agency PTI.

Acting on inputs, the police raided a drug manufacturing unit at Jite village in the Mahad MIDC area on Wednesday, the official said.

The raid was carried out with the help of various teams, and assistance from the Anti Narcotics Cell (ANC) of Mumbai police was sought, he said, reported PTI.