UPDATED 1:49 p.m.: It appears authorities are no longer searching the Willamette River.

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Authorities are searching for someone who jumped from the Hawthorne Bridge into the Willamette River on Friday morning, an official said.

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Capt. Louisa Jones, a Portland Fire & Rescue spokeswoman, said the person who jumped didn't surface and that no one has seen them since. Fire responders are trying to find the person under the water using sonar, she said.

Jones didn't know whether the person in the water is a man, woman or child.

She said authorities were dispatched to the scene shortly before 11:50 a.m.

— The Oregonian/OregonLive