The Coast Guard says a 75-foot fishing boat that sank Tuesday in the Columbia River west of Longview, Wash., has as much as 600 gallons of diesel on board and some of that fuel has spilled into the river.

Petty Officer 1st Class David Mosley says an estimated 50 to 100 gallons of fuel has been released. Mosley says the owner of the wood-hulled trawler Granby quickly reported the sinking and helped put out containment boom to minimize any spill damage.

The Washington Ecology Department says the owner has also hired two private companies to contain and clean up any damage.

Mosley says a light sheen has been seen downriver but that's expected to dissipate. On Tuesday evening, he was not aware of any damage to wildlife.

Mosley says divers will try to remove the fuel.

The cause of the sinking is under investigation.

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