Keith Olbermann off air after tweets

— -- Keith Olbermann will not host his show for the rest of the week, ESPN said Tuesday, because of tweets critical of Penn State and its annual THON fundraiser.

"We are aware of the exchange Keith Olbermann had on Twitter last night regarding Penn State," ESPN said in a statement. "It was completely inappropriate and does not reflect the views of ESPN.

"We have discussed it with Keith, who recognizes he was wrong. ESPN and Keith have agreed that he will not host his show for the remainder of this week and will return on Monday.

"The annual tradition of THON and the efforts of the students of Penn State to fight pediatric cancer should be applauded."

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Olbermann apologized in a tweet Tuesday.

THON is an IFC/Panhellenic dance marathon at Penn State, which since 1977 has raised more than $127 million for the Four Diamonds Fund at Penn State Hershey Children's Hospital, according to the THON website. The most recent marathon took place Friday to Sunday and raised $13 million.