A fire destroyed the 90-year-old hardware store on Pennsylvania Avenue SE on June 6, 2013.
Federal and local officials say the fire that heavily damaged Frager's Hardware store on Capitol Hill this month was caused by carelessly discarded smoking material.
The Bureau of Alcohol, Tobacco, Firearms and Explosives and the fire department said Friday that the June 6 fire was accidental.
Authorities say the fire began in the receiving area on the 11th Street side of the building. Plumes of smoke could be seen for miles while the fire raged, including over the dome of the U.S. Capitol.
Frager's has been in business about 90 years. The store reopened lawn and garden portion of its business at a nearby location.