A Level III fire broke out on Monday at the GST Bhavan in Mumbai's Mazgaon area.
13 fire engines, one fire truck and two quick response vehicles have been deployed to fight the blaze.
The fire is located on the 8th floor of the GST Bhavan.
Three hose lines are in operation from inside the building and two lines of turntable ladders from outside the building. The under-repair building is smoke logged.
Fire operations are in progress.
No injuries have so far been reported.
Videos of the fire showed flames billowing out of the windows on the top two floors.
The incident was reported at 12:35 p.m.
Further details awaited.
