A top official of state finance department said that, the fire started in a section of Block-F building and a part of finance department office was completely destroyed in the fire.
The official said that, the fire was caused by a short circuit and actual reason will be found out during investigation.
"Several important files and documents were destroyed in the incident," the official said.
No injury or casualty has been reported in the incident.
Later fire tenders were rushed to the area, which brought the situation under control.
Police has started investigation to find out the actual cause of the fire incident.
(Reporting by Hemanta Kumar Nath)