PORTLAND, Ore. (KOIN) – Tuesday marked the fifth day of searching for clues after two body parts were found in the Tualatin River in Hillsboro, Oregon.

The Washington County Sheriff's Office is working under the assumption the body parts belong to the same person, but they can't confirm they are.

"This is really uncommon. Unsettling [and] concerning are other terms I would use to describe this incident," said Washington County Sheriff's Office Public Information Officer David Huey.

On Friday, Aug. 8, a kayaker found a body part floating in the river, prompting an investigation by the Washington County Sheriff's Office and detectives from the major crimes team. But the mystery didn't stop there. About a mile downstream, detectives found a second body part the following day.

"There is so

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