The FBI says a threat to explode dirty bombs at NFL stadiums is a hoax. The warning was made public this week after a message was posted on an internet site. Special Agent Richard Kolko says there's no cause for concern among fans, and the public should feel safe attending games this weekend.
Officials interviewed a person in Milwaukee earlier today who may have been connected to the message. Kolko says the interview was part of the ongoing investigation to determine why the message was posted, although he couldn't provide specifics about the person interviewed. The person was released, but officials aren't saying if any charges are pending.