CHICAGO — An official said Illinois Gov. Rod Blagojevich was arrested in Chicago on corruption charges stemming from the selection of the successor to President-elect Barack Obama's U.S. Senate seat.

U.S. Attorney's Office spokesman Randall Samborn said both Blagojevich and his chief of staff John Harris were arrested today. Authorities aren't yet releasing details about those charges. However, a federal law enforcement official told The Associated Press the governor is accused of corruption charges. The official said the charges stem from the selection process of a successor to Obama.

Federal prosecutors have investigated Blagojevich's administration for at least three years. They've been looking at everything from how he hired people for state jobs to the actions of friends and contributors.

The governor has repeatedly denied any wrongdoing.