A gun factory in Newport, New Hampshire, is operating normally despite a fire overnight in an area where gun parts are cleaned.

The fire at the Sturm Ruger & Co. factory was reported about 6:30 Sunday night and put out in less than an hour.

Tom Sullivan — vice president for operations at the factory — says the fire was in a small room with tanks of chemicals used to clean new gun parts. Because of that, firefighters had to use dry chemicals rather than water.

Sullivan says an electrical problem with a heater may have started the fire. He says the company is still assessing the damage.