The fire broke out due to a short circuit outside the office of Social Justice Department Secretary R D Shinde and Minister of State for Tribal Affairs Rajendra Gavit at around 1545 hours.
The secretariat complex was immediately vacated and power switched off.
"Though the fire was minor, we rushed 3 fire engines, 2 water tankers and one jumbo tanker at the spot to avert the possibility of any mishap, a senior fire brigade official told PTI.
Parliamentary Affairs Minister Harshvardhan Patil told reporters that the short circuit was a minor one.
"The defect was brought under control by cutting off the exposed wire," he said.
The fire on June 21, 2012, left five people dead, apart from causing extensive damage to the six-storey building.
Photograph: Sahil Salvi
Hit-and-run: Unsure if Salman was drunk, says bar manager
Maharashtra Cong wants change in leadership
RBI asks banks to give information to SIT on black money
Centre keeps away from row over Delhi Unversity's 4-year-course
Campa Cola residents give in; agree to let civic body in