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UPDATE: Mitchell Kelly was found not guilty on all charges in Washington County court April 23.

PORTLAND -- A swim instructor from Beaverton was arrested by police for sexually abusing young girls in a secluded room at the Sunset Athletic Club.

Mitchell Alan Douglas Kelly, 17, was arrested after the facility reported the abuse to police on June 23, according to the Washington County Sheriff's Office.

Kelly was arrested and arraigned June 30. He has been charged with two counts each of first-degree sexual abuse and using a child in display of sexually explicit conduct.

The abuse reportedly took place after a swim lesson, police said.

The general manager at the Sunset Athletic Club said safety of the club's members is a top priority. She said the club was fully cooperating with the investigation.

A man who provided massage therapy at Sunset Athletic Club was arrested in March for sexually abusing a 15-year-old girl.

More: Massage therapist arrested for teen sex abuse

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