CBS reports that Sen. Barack Obama’s announcement of his choice for running mate will come Friday afternoon.

CBS News has confirmed that Barack Obama’s campaign now plans to announce Obama’s vice presidential choice to supporters via email and text message on Friday afternoon. (This plan could change, of course.)

He will then appear with his running mate at noon the next day in Springfield, Illinois, CBS News chief political consultant Marc Ambinder reports.

As CBS goes on to note, media reports have narrowed the field down to Virginia governor Tim Kaine, Indiana senator Evan Bayh, and Delaware senator Joe Biden.

Biden, however, has told the media that it’s not him.