Sep. 25, 2009 (Business Wire) -- Tesoro Corporation (NYSE:TSO) today reported that a fire which broke out in the coking unit at Tesoro’s Wilmington refinery has been extinguished and no injuries have been reported. The cause of this incident is under investigation and the amount of damage to the affected unit is unknown at this time. Other units at the refinery are currently operating but at reduced rates.

Tesoro Corporation, a Fortune 100 company, is an independent refiner and marketer of petroleum products. Tesoro, through its subsidiaries, operates seven refineries in the western United States with a combined capacity of approximately 665,000 barrels per day. Tesoro's retail-marketing system includes over 870 branded retail stations, of which over 380 are company operated under the Tesoro®, Shell®, Mirastar® and USA Gasoline™ brands.