Beaverton, OR -

Investigators say a fire at a Beaverton sex offender treatment center was deliberately set.

Washington County sheriff's Sgt. David Thompson told KATU it looks as if someone broke in, ransacked the place and started the fire in the room where records were kept.

A passer-by noticed smoke Saturday morning and called 911, and firefighters quickly put out the fire. A Tualatin Valley Fire investigator determined the fire was started in the garage of the house that was converted into the Center for Behavioral Intervention.

No one stays in the center overnight.

Investigators say whoever broke in also stole some money, then used some fuel to set fire to furniture and files.