Gov. Rod Blagojevich and his chief of staff, John Harris, were arrested by FBI agents on federal corruption charges Tuesday morning.

Blagojevich and Harris were arrested simultaneously at their homes at about 6:15 a.m., according to Frank Bochte of the FBI. Both were transported to FBI headquarters in Chicago.

In one charge related to the appointment of a senator to replace Barack Obama, prosecutors allege that Blagojevich sought appointment for himself as secretary of Health and Human Services in the new Obama administration, or a lucrative job with a union, in exchange for appointing a union-preferred candidate.

Another charge alleges Blagojevich and Harris conspired to demand the firing of Chicago Tribune editorial board members responsible for editorials critical of him in exchange for state help with the sale of Wrigley Field, the Chicago Cubs baseball stadium owned by Tribune Co.