Breaking: TVNewser has learned Katie Couric will interview Republican VP nominee Gov. Sarah Palin next week on the campaign trail, days before the first presidential debate.

We hear the interview will air on the CBS Evening News and on all CBS News platforms. It will also include something the previous two interviews did not — time with Sen. John McCain and Palin together.

An announcement is expected shortly.

> Update: The official announcement, after the jump. The interview takes place Sunday (the 28th) and Monday, from the trail.

Katie Couric will spend two days traveling on the campaign trail with Governor Sarah Palin on Sunday, September 28 and Monday, September 29, conducting an exclusive interview to be broadcast on the CBS EVENING NEWS WITH KATIE COURIC beginning Monday (29). Coverage will continue on Tuesday, September 30 on THE EARLY SHOW and CBSNews.com. Coverage of Couric’s travels and interview with the Republican Vice Presidential nominee will include behind-the-scenes access and Palin with Senator McCain as they campaign in battleground states.