MATTAWA, Wash. (AP) — Officials with the Grant Public Utility District say six employees have been injured in an explosion at Priest Rapids Dam on the Columbia River.

Utility district spokesman Thomas Stredwick says the employees were injured Thursday afternoon in a possible electrical explosion at the dam near Mattawa. The six have various levels of injuries with some flown to area hospitals and others transported by ambulance for treatment.

Stredwick says the structure of the dam is stable and no one down the river is at risk.

Multiple agencies have responded to the incident including the Hanford Fire Department.

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