A fire occurred at approximately 12:30 a.m. (PT) this morning at the Tesoro Corporation (NYSE: TSO) refinery in Anacortes, Washington. At this time, there is one confirmed fatality, four employees have been admitted into the local hospital for treatment and three employees remain unaccounted for.

The fire occurred at the naphtha unit while performing maintenance work and was extinguished at around 2 a.m. local time. At this time there have been no reports of off-site impacts related to the incident.

The Sheriff’s Department has been notified and personnel are on site responding. The Washington Department of Labor and Industries and the local air district have been notified of the event.

Tesoro’s Emergency Incident Command has been activated to respond to this incident and the units affected have been shut down and stabilized. Our priority at this time is focused on the safety of our employees and the community.

Tesoro Corporation, a Fortune 150 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 880 branded retail stations, of which over 380 are company operated under the Tesoro®, Shell®, Mirastar® and USA Gasoline™ brands.

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