Firefighters respond to smoke near Ross Island Bridge

Smoke on Ross Island Bridge, Dec. 14, 2017. KATU photo

PORTLAND, Ore. - Visible smoke on the east end of the Ross Island Bridge was causing drivers to slow down Thursday morning.

Portland Fire and Rescue said a brush fire on the bank of the Willamette River caused the smoke.

Two fire engines responded and made quick progress on the fire.

Officials say the fire is burning in a difficult location with a steep embankment. It's about 10 to 12 feet deep in blackberry brambles, which, when they burn, produce a lot of black smoke.

An investigator is working to determine how the fire started.

This is a developing story. We'll bring you updates.

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