Dirty Bomb attack this Weekend?

Fox News are currently reporting a threat against 7 US NFL stadiums this weekend.

The reports state that these could be dirty bombs.

Information is slow coming out but the US Department For Homeland Security have said this isn't a credible threat.

As they've seemingly overplayed other threats in the past, this seems a little unusual.

UPDATE 22:08BST 18/10/06:

More information can be found on Google News