One suspect, John Worman, 39, of Colwyn, Delaware County, allegedly installed a video camera in his bathroom wall and videotaped four children as they used the toilet, undressed and showered.

Worman, according to an indictment, sexually abused eight other children, including five whom he forced to engage in oral, vaginal and anal sex, from 1997 through 2006.

Three of the children that Worman forced oral and vaginal sex upon were infants, one of them just three months old, authorities said.

He videotaped the assaults and downloaded the images to his computer, they added.

Worman and two women - Dorothy Prawdzik, 43, of Drexel Hill and Concetta Jackson, 44, of Collingdale, both in Delaware County - were charged yesterday in a 53-count indictment with producing child pornography.

The charges were announced by U.S. Attorney Patrick Meehan, Delaware County District Attorney G. Michael Green and FBI Special Agent-in-Charge J.P. Weis.

Jackson, authorities said, knew about the camera and helped Worman videotape the four children between 2003 and 2006.

Prawdzik helped Worman video the kids by posing them in front of hidden video cameras, undressing them and having them expose their genitals, it was alleged.

At one point in the investigation, investigators got a search warrant for Worman's home and recovered more than one million images from his computer, including thousands of videos that Worman produced himself committing sexual acts on children.

"This was a long-term, planned and horrific exploitation of young children," Meehan said. "According to the indictment, the defendants allegedly manipulated and abused children, even infants, to satisfy unimaginable perversions, and they did it repeatedly."

Authorities said that during the period covered by the investigation, Worman had relationships with Prawdzik and Jackson, at different times.

The case was brought as part of Project Safe Childhood, which was launched in February 2006 by U.S. Attorney General Alberto R. Gonzales.

It was described as a nationwide initiative designed to protect children from online exploitation and abuse. *