AP reports

It's being held at Hannover stadium. There's no information but it's almost-certainly terror related. It's almost 7:30 pm in Germany so it was a last-minute decision.

France plays England in London today as well.

The world will be on edge for awhile.

Update: Separately, Reuters reports that a passenger on a Boston-bound British Airways aircraft was attempting to enter the cockpit and was restrained.

Update 2: Evidently he tried to force open an exit door on the plane, not the cockpit.

Update 3: The passenger was 'intoxicated' according to reports.

Update 4: Dutch TV says the game was cancelled due to a 'concrete' threat.