From the New York Times, October 1:
The German authorities said the rare decision was taken after an earlier explosion in a residential area of the city.
The German authorities closed the Oktoberfest grounds in Munich on Wednesday because of a bomb threat that they said was linked to an explosion in a residential area of the city.
The Munich police said in a statement that emergency medical workers were called to a burning building in the north of the city earlier on Wednesday after neighbors reported hearing explosions. One severely wounded man who later died was found at a lake close to the house and “explosive traps” were discovered inside the building itself, the police added. They did not disclose the identity of the man or say how, if at all, he was connected to the blast.
The authorities initially said that they believed the fire had been linked to a domestic conflict and that officers were searching several places associated with the episode — including the Theresienwiese, the site where Oktoberfest takes place.
Thomas Schelshorn, a police spokesman, later said that “a nonspecific bomb threat” had been found at the house, which prompted the searches....
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Kids, don't let your domestic disagreements escalate to the level of bombs and boobytraps.