The Colorado prison where former Illinois Gov. Rod Blagojevich is serving a 14-year sentence was secured Monday for a hazmat situation in the mail room.
Staff at the Federal Correctional Institution (FCI) Englewood found a "white, powdery substance" in an envelope addressed to an inmate, a spokesman for the Federal Bureau of Prisons said in a statement.
The mail room was contained, and the West Metro Fire Protection Hazmat team along with local and federal law enforcement was notified.
The institution was secured "as a matter of standard procedure." The Federal Bureau of Prisons said there was no threat to public safety and the substance was not hazardous.
Blagojevich surrendered to the prison on May 15.