The fire occurred at a shoe showroom late last night and fire tenders were immediately rushed to the spot which managed to control the flames by 1 AM, they said.
However, fireman Dinesh Lasure (38) was seriously injured after being hit by a piece of glass at the showroom. He has been admitted to a hospital.
Fire officials said the blaze was possibly caused by a short-circuit, though further investigation was on.
Nashik Mayor Yatin Wagh and senior police officials also visited the spot.