http://www.telegraph.co.uk/news/worldnews/europe/9506173/WW2-bomb-detonates-in-Munich-setting-homes-on-fire.html
Approximately 2,500 residents had to be evacuated from the Schwabing district of Munich to allow the detonation of a WW2 bomb on Tuesday night.
Straw, which had been laid down to limit damage from the explosion caught light during the detonation, resulting in several small fires on the roofs of nearby houses.
The bomb was discovered on Monday night by building workers at the site of an old bar that was being demolished.
Munich police spokesman, Reinhold Bergmann said, "a detonation was necessary because the bomb disposal unit was not able to defuse the bomb, so that as a last resort we had to detonate the bomb where it was. The whole thing happened at 21:55 (8.55pm BST)."