Investigators say at least 70 teenagers have come forward in a Facebook lewd photos case involving a male Southern California teacher who posed as a girl to lure boys into online relationships.

Irvine police say 30-year-old Zachary Reeder, who was arrested last weekend and posted $1 million bail, convinced the boys to send him sexually explicit photographs of themselves.

It's not believed Reeder had any in-person contact with the boys.

Reeder is a history teacher at Servite High School, a Catholic all-boys school.

The Orange County Register says Reeder posed as a "young, blonde, white female" on the social networking site to get boys as young as 14 to send photos.

Prosecutors have charged Reeder with 140 felony counts involving child porn.