The Mumbai Police have registered an FIR against a father-son duo involved in dairy products business and a real estate agent for allegedly duping a medical shop owner to the tune of Rs 2.2 crore in connection with a property deal, an official said.

The victim in his complaint to Vakola police said he had a discussion with the dairy businessman to buy 60 gunta land (one guntha is equal to 1,089 square feet) in neighbouring Palghar district.