Firefighters respond Friday to a call at Gaslight Tavern in North Lawrence. The fire, which started just before 6 p.m., was confined to a small utility room in the rear of the building. The structure was unoccupied at the time of the incident and no one was injured. There were no damage estimates Friday, and the cause of the fire was unknown.

Fire investigators have determined a May 6 fire at a North Lawrence bar was an accident.

Fire marshal James King, a Lawrence Douglas County Fire and Medical division chief, said Monday the fire in a utility closet at the former Gaslight Tavern, 317 N. Second St., was caused by discarded smoking materials.

It caused an estimated $50,000 in damages– mostly in smoke damage — to the business. When fire crews arrived about 6 p.m. May 6, the building was unoccupied.

The bar is near the Kansas River bridge that leads to downtown Lawrence, just south of Johnny’s Tavern.