Milwaukie Police arrested 41-year-old Jason James Karsten on allegations of child sex abuse. He is accused of abusing 12-year-old girls in his home on SE Plum Street  over the last year.

He is charged with three counts of first-degree Sex Abuse, and is being held on $750,000 bail.

Detectives are concerned there may be more victims that have not yet come forward. Anyone with information is asked to contact the Milwaukie Police Department at 503-786-7500.

No other details are being released.