By ANNE E. KORNBLUT and KATHARINE Q. SEELYE

WASHINGTON, Oct. 2 — At least two news organizations were tipped off to e-mail messages sent by Representative Mark Foley long before the story of his sexually explicit remarks to teenage pages broke last week and forced him to resign.

The St. Petersburg Times and The Miami Herald received copies of an e-mail exchange between Mr. Foley, Republican of Florida, and a teenager, but neither paper gathered enough solid material to publish a story, according to statements by the papers’ editors.

It was not until the exchanges were published online last week, first by an anonymous blogger, then on the ABC News Web site, that the story gained momentum and grew more damaging as other teenagers came forward.

The trickle of information about Mr. Foley’s messages, first made known to the news media almost a year ago, has raised questions not only for Congressional officials but also for news organizations about how to handle anonymous sources making explosive accusations in an election year.

At the same time, the papers’ decisions not to report the accusations are being cited by Republican leaders as justification for why they themselves did not step forward earlier to try to stop Mr. Foley.

“He deceived his in-state newspaper when they each questioned him,” Speaker J. Dennis Hastert said Tuesday. “He deceived me, too.”

The St. Petersburg Times said that last November, it received copies of an e-mail exchange between Mr. Foley and a former page from Louisiana. The newspaper said the boy, who was under age, did not want his name used, and the paper said it did not want to publish accusations based on unnamed sources. The Miami Herald apparently received the same information, although it is not clear when it received it.

Brian Ross of ABC News said he learned about the e-mail messages in August but was too busy with Hurricane Katrina and the anniversary of the Sept. 11 attacks to pursue them immediately. None of the organizations seemed to anticipate how big the story would become.

“I never thought it would lead to his resignation,” Mr. Ross said.

When The St. Petersburg Times received its first tip on the e-mail messages in late 2005, the editors decided it was “friendly chit-chat,” with nothing overtly sexual, but nonetheless assigned two reporters to find out more, according to an editor’s note.

The reporters tracked down the teenager, but he refused to let them use his name in a story. They found a second page who had corresponded with Mr. Foley and was willing to let them use his name but said he did not have a problem with the messages, undercutting the premise.

When the newspaper asked Mr. Foley about the messages, he “insisted he was merely trying to be friendly,” Scott Montgomery, the newspaper’s government and politics editor, wrote Saturday in a note to readers.

The editor of The Herald, Tom Fiedler, said the initial messages did not seem to justify writing a story. “We determined after discussion among several senior editors, including myself, that the content of the messages was too ambiguous to lead to a news story,” Mr. Fiedler was quoted in his paper as saying.

Then, in June, the reports resurfaced on Capitol Hill, where a neighborhood resident struck up a conversation in a bar with someone who had provided the e-mail messages. He said he passed them on to several news outlets. The resident, who said he was not affiliated with either party and was motivated by concern for the teenager, would talk only on condition of anonymity.

No one acted on the information until last week, and even then, it was a Web site that first posted the exchange. It is not clear who maintains the Weblog, stopsexpredators.blogspot.com, which appears to be largely devoted to the Foley scandal.

ABC News had its first account several days later on its Web site.

Mr. Ross said he was surprised by how quickly the congressman’s office confirmed the authenticity of the e-mail messages, first when ABC reported them on Sept. 28, and again a day later when confronted with much more explicit exchanges.

Mr. Ross dismissed suggestions by some Republicans that the news was disseminated as part of a smear campaign against Mr. Foley.

“I hate to give up sources, but to the extent that I know the political parties of any of the people who helped us, it would be the same party,” Mr. Ross said, referring to Republicans.

David D. Kirkpatrick contributed reporting.