A fire broke out on the sixth floor of the Income Tax building in Churchgate on Thursday night around 10.15 pm.
The fire brigade reached the spot within 10 minutes of receiving the call and started rescue operations.
Four fire engines, four water tankers and an ambulance reached the spot.
The building has the office of the Commissioner of the Income Tax.
There were no reports of any one getting injured so far
A fire official said, “We got a call around 10.15 pm and we reached the spot immediately. As it is a government office, it was important to prevent major loss of documents. The fire-fighting operations are on.”