He said that though the blaze was controlled within one hour, a team of fire fighters were deployed at the spot as a precautionary measure to ensure there was no more damage to the affected building.
The 187-year-old epitome of cultural and royal heritage of last Dogra rulers is under renovation.
The fire was at a secluded place within the sprawling complex, away from the buildings which are under renovation, Hak said.
He said that officers in the chief minister's secretariat directly supervised the fire-fighting operation during which six fire tenders were pressed into service.
Asked about the cause of the fire, Hak said, It is a matter of investigation.
In December 2006, a mysterious fire caused some damage to Toshakhana (treasure house) within the complex following which the valuable articles made up of gold and silver were shifted from there to a strongroom in the Civil Secretariat, Jammu.
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