YAKIMA, Wash. — Searchers unsuccessfully scoured 10 miles of the Roza Canal in the Lower Valley on Monday, looking for an East Selah teen authorities say slid into the water Friday.

Canal company employees and relatives of the 18-year-old man searched a section of the canal between Zillah and Sunnyside, said Yakima County Sheriff’s Sgt. George Town.

Cadaver dogs from the Yakima County Search and Rescue Team will join the search operation today, Town said. The dogs will check the area around some of the siphons on the canal to determine if the man’s body may have been caught there.

The incident began around noon Friday, with a report of suspicious activity along the canal bank in East Selah, according to the sheriff’s office. Deputies and U.S. Bureau of Reclamation employees determined that someone had slid into the canal, according to earlier statements from the sheriff’s office.

The search shifted to the Zillah area Saturday after a witness on Cheyne Road reported seeing a body in the canal matching the man’s description, Town said.

Detectives are still trying to determine how the man got into the canal, Town said.

Anyone with information should call the sheriff’s office at 509-574-2500.