Updated

At least 50 more people nationwide are expected to be arrested in an FBI sting to bring down an Internet child-pornography ring.

As of Monday, at least 89 people in 26 states had been charged in the "Operation Candyman" sweep. The sting went after the members of three Internet discussion groups on Yahoo Inc.'s Web site. The FBI has made public the name of one, "Candyman," which was apparently named after a song in the 1971 movie Willy Wonka and the Chocolate Factory.

Organizers of the Candyman group described it online as "for people who love kids. You can post any type of messages you like, too, or any type of pics and vids you like, too. P.S. If we all work together we will have the best group on the Net."

Mike Heimbach, head of the FBI's child crime unit, described the images exchanged on the Candyman group as "very explicit" and "hard-core."

All three Internet groups have been shut down. Investigators declined to identify the other two groups by name, saying it might interfere with efforts to trace suspects through their e-mail addresses. They said 7,000 people worldwide registered e-mail addresses with the Candyman group, and authorities were able to trace 1,400 people in the United States through those addresses.

FBI officials in Washington declined to identify by name any of those arrested or charged, except to list the occupations of some they described as "significant perpetrators" because they held jobs where they might spend time with children.

The officials said those people included a Catholic priest in the St. Louis area; a school bus driver in Albany, N.Y.; a preschool teacher's aide in Las Vegas; a child photographer and an unspecified clergy member in Philadelphia; and a police officer in West Virginia.

Local police arrested two people in Minnesota before Monday in connection with the sting. They included the former city administrator for Bayport, Kenneth Hartung, who resigned after he was arrested last November and charged with possession of child pornography.

Authorities also executed "several" federal search warrants in Minnesota on Monday, said Paul McCabe, spokesman for the Minneapolis FBI office. McCabe said those searches were conducted in both the Twin Cities metro area and in outstate Minnesota. He said he couldn't provide further details because the investigation is continuing.

But police in La Crescent said they searched a residence Monday and seized "numerous items." Investigator Scott Yeiter said most of them were turned over to the Minnesota Internet Crimes Against Children Task Force for analysis, and charges will be filed against the suspect if they're deemed warranted.

"I'd like to see one sweep a day," said Bruce J. Gebhardt, FBI executive assistant director for criminal investigations and cyber-crime. "We want to keep the pressure up on all these people."

Gebhardt said Yahoo executives cooperated with FBI requests for information about the subscribers to the discussion groups. But Gebhardt declined to say whether he believed Yahoo should have monitored its discussion groups to prevent them from operating as open exchanges for child pornography.

In Las Vegas, authorities said Beckham Baker, 23, was indicted Feb. 6 on one charge of receiving child pornography and one charge of possession of child pornography. Baker, who worked in a southern Nevada day care center, is free pending his next court appearance.

FBI Special Agent Gayle Jacobs said authorities moved quickly to arrest Baker because of his job. "Obviously, he needed to be removed from working with children," she said.

Reached by telephone Monday at his Las Vegas apartment, Baker said he was seeking to hire a lawyer and declined to comment further.

The school bus driver in New York was identified as Shannon Timothy Macauley, 36, of Constable, N.Y. Macauley was charged by state police in November and December with sodomizing five boys. Another arrest in New York was of John J. Schmidt Jr., 51, of Dolgeville, N.Y. Schmidt, an elementary school teacher, was charged in November with receiving child pornography on his home computer from Internet sites.

Schmidt pleaded innocent. His attorney, Frank Policelli, said he couldn't comment on evidence he still hasn't seen.

"The government always comes forth before anybody can see what kind of case they have," Policelli said. "You can't form an opinion just because the government made charges. They can charge anybody."

In St. Louis, archdiocese officials disclosed earlier this month that a computer belonging to the Rev. John Hess, a priest at Sacred Heart Catholic Church in Florissant, had been seized as part of a child pornography investigation. But authorities could not say late Monday whether that search was related to Monday's announcement in Washington. Hess has been removed from the parish.

FBI spokesman Pete Gulotta in Baltimore confirmed that among those also charged was the Rev. Thomas A. Rydzewski, an associate pastor at the Cathedral of Mary Our Queen in Baltimore. His arrest on Dec. 13 had been previously announced there by authorities, but there was no indication of a larger investigation until Monday's announcement.

"A new marketplace for child pornography has opened in the dark corners of cyberspace," Attorney General John Ashcroft said Monday in announcing the investigation. "There will be no free rides on the Internet for those who traffic in child pornography."

The Associated Press contributed to this report.