Nagpada police in Mumbai have busted an illegal gold processing and trading racket in Kamathipura, seizing smuggled and stolen gold worth Rs 1.77 crore. Four individuals were booked under the Bharatiya Nyaya Sanhita Act after police investigated smoke emanating from a rented flat. The accused, who were melting gold using machinery, could not produce valid documents for the seized gold, which included granules and pieces.