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Portland police officer Sgt. Timothy Robinson was arrested in Beaverton early Saturday, Dec. 10, 2016 for DUII.

(The Oregonian/OregonLive/file)

An off-duty Portland police sergeant was arrested in Beaverton early Saturday morning for driving a city-owned vehicle while under the influence of intoxicants, officials said.

Sgt. Timothy Robinson, who has worked with police for 18 years, was arrested for driving under the influence of alcohol, police spokesman Sgt. Greg Stewart said. Robinson was booked into the Washington County Jail.

Robinson was not in custody on Saturday evening.

Robinson, a sergeant for the Drugs and Vice division, has been assigned to the Telephone Reporting Unit pending the resolution of the case in Washington County, Stewart said. This is standard practice, Stewart said.

Once the criminal investigation is complete, an independent review of the case will be presented to Portland Police Review Board, Stewart said.

Police declined to comment further.

-- Samantha Matsumoto