(CNN) -- Sen. Barack Obama's choice for running mate will be announced to supporters in a text message Saturday morning, senior Obama campaign officials told CNN on Friday night, and a senior party official said it won't be Sen. Hillary Clinton. Sen. Barack Obama says he has decided on his running mate but is not yet ready to reveal the name. Obama called some people on his short list for the vice presidential slot Thursday night to tell them he had not selected them as a running mate, a highly placed Democratic Party source said. A senior Democratic official who had spoken with Clinton told CNN late Friday that the Obama campaign has communicated to her through private channels that she will not be Obama's vice presidential pick.
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NEW: Supporters to get name of running mate in text message
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NEW: Sen. Hillary Clinton is out, Democratic party source says
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NEW: Sources: Virginia Gov. Kaine, Indiana Sen. Bayh out of running
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Obama calling some of VP contenders, Democratic source says
However, late Friday two Democratic sources confirmed that Indiana Sen. @placeholder is also out of the running.