Additional District Magistrate (ADM) Preeti Jaiswal said on receiving secret information, raids were conducted on the illegal sweets making workshops in Harsh Vihar colony.
During the search around 4,000 kg rasgulla was seized and sent to be destroy as it was being prepared with "synthetic milk" brought from Mathura and some prohibited and poisonous chemicals, she said, adding also condition of the workshops was unhygienic.
However, samples have been taken and sent to laboratory for testing.
A drive has been launched against those involved in the preparation and trade of adulterated sweets, the ADM city said.
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