Scott Pelley, Katie Couric

Decisions regarding Katie Couric's future at CBS Evening News and any possible replacements have not been determined yet, a source tells

On Tuesday, TMZ reported that 60 Minutes correspondent Scott Pelley will succeed Couric as Evening News anchor, but a source tells that nothing's been discussed for either journalist.

Report: Katie Couric to leave CBS Evening News

Couric, the first woman to solely anchor a nightly network newscast, is expected to step down from her post when her contract expires in June to start a syndicated talk show in 2012. She told The New York Times on Monday that she and former NBC boss Jeff Zucker have been "discussing the possibilities" of a talk show.

Pelley, who's worked at CBS for 21 years, was one of three names floated by The Associated Press Monday as replacement candidates, along with Harry Smith and Russ Mitchell.