INDEPENDENCE, Ore. -- The bodies of the two brothers who disappeared while fishing in the Willamette River Sunday have both been found, investigators on the scene told KGW.

The body of 20-year-old Alvin Troub was found submerged in water near a dock around 1 p.m. Tuesday, about 30-40 ft. from where their fishing poles were found. The body of his eight-year-old brother, Michael Runyon, was found an hour later in the water nearby.

Courtesy photo

Alvin Troub, 20, and his 8-year-old brother, Michael Runyon as shown in a family photo.

The brothers were last seen Sunday fishing on the Willamette River banks in Independence.

Polk County authorities had given up their search for the two brothers Tuesday and changed the effort from rescue to recovery after clues kept pointing them to the likely drownings.

During the search on Monday, water scent dogs marked two places in the river. A dive team from the Linn County Sheriff's Office dove in one of these areas but found nothing. They said visibility in the river to be less than a foot, so searching was very difficult.

Then, Tuesday morning, three new water scent dogs were brought to the riverside and they also marked a location near the area where the different set of dogs had alerted their trainers the day before.

On Sunday and Monday, search crews used boats, divers and cameras along with dogs, helicopters and volunteers to try and find the two boys.

Mary Troub, the boys’ mother, said Michael cannot swim and was probably “very, very scared.” She also said that Michael was diagnosed with autism.

"They're extremely close. Alvin's like a role model to Michael. He loves him to death,” Mary Troub told KGW on Monday.

Authorities found the boys' fishing equipment yards away from the river. The river was running very high, they said, and the brothers could have fallen in.

Family members spread the brothers' pictures that were plastered on flyers in store-front windows from Independence all the way to Monmouth.

KGW Reporters Mike Benner and Erica Heartquist contributed to this report.