An explosion in an electrical transformer, which sent flaming oil down a street, rocked the Wells Fargo bank building at 200 S. Virginia Street Tuesday afternoon.
The explosion and subsequent fire forced the evacuation of the bank building and the nearby Washoe County Courthouse before the blaze was extinguished.
The cause of the explosion and fire is under investigation.
At the time of the fire, plumes of dense, black smoke rose high over the downtown core and also damaged the outside of the eight-story bank building.
Fire Marshal Larry Farr said that the oil used as a coolant for the transformer leaked down the street, carrying flames with it.
There was one known injury in the blaze. A woman, who said she was walking past the bank building when the explosion occurred, suffered minor burns to her face. Paramedics treated the woman at the scene.
Traffic is restricted on Virginia Street near Court and Pine streets.