Investigators say a male teacher has been posing as a Southern California girl on Facebook to lure boys into online relationships.
Anaheim police say 30-year-old Zachary Reeder convinced the boys to send him sexually explicit photographs of themselves.
It's not believed Reeder had any in-person contact with the boys.
KCBS-TV reports that Reeder was arrested on Saturday.
Investigators are trying to determine if Reeder used his job as a history teacher at Servite High School – a Catholic all-boys school – to target victims.