Well, that was quick....in the past twenty minutes, they decided the Germany-Netherlands soccer game for tonight WILL NOT be played. Evacuation of the stadium started around 7:30 in the evening.
Based on Focus and their reporting....the cops in Hanover said there is a problem....suggesting there are suspects within the stadium as fans started to show up, and the cops decided enough was enough. They've told the fans to leave the stadium.
Some reports via German news media indicate that there appears to be some planning in progress for a Paris-like attack.
Probably more to come later tonight.