11 fire tenders were working in tandem to douse the fire which broke at a factory located on Sultan Alam Road in the Charu Market area of Tollygunge at around 5 PM, they said.
"The cause of the fire is not yet known, but large amount of plastic substances and adhesive stacked inside the factory is helping the blaze," a senior officer of the fire department said.
"Because it is a very congested residential area we are trying our best so that the fire does not spread to the adjacent buildings," he said.