Hillary Clinton addresses a UN women's forum Tuesday, but the highlight comes afterwards when she holds a press conference to address the email scandal that has dogged her for a week, US media reported.
Clinton, the presumptive Democratic frontrunner for the 2016 presidential race, did not mention the controversy Monday when she released a report on women's equality, the focus of the United Nations conference where she speaks at 1:40 pm (1740 GMT).
But sources close to the former secretary of state told broadcasters including ABC and CNN that she will hold a press conference afterwards and take questions about why she used a private email account during her four years as head of the State Department.
A Clinton spokesman did not directly confirm that she will address her email use but urged reporters to attend the event at the United Nations.
Clinton has come under mounting pressure to address the issue, which Republicans have seized on as a sign Clinton may have sought to keep sensitive emails private despite her official communications being part of the public record.
She has already turned over 55,000 pages of emails to the State Department, and last week Clinton tweeted that she wanted them released to the public. A source told CNN on Monday that Clinton will say her email use on a private account and private server was "completely innocent," and that she did not handle classified information on that account.
Republicans insisted the entirety of Clinton's correspondence while she was Washingon's top diplomat, reportedly from a clintonemail.com address, be considered for release.
"Anything short of Hillary Clinton releasing her secret server to an independent arbiter would demonstrate that she's not interested in being transparent with the American people," Republican National Committee chairman Reince Priebus said.