Police were sent to inspect the hole, which measured 33 feet wide and 13 feet deep, they said.
A World War 2 bomb left a huge crater in the middle of a field in Germany after suddenly exploding in the middle of the night..
"The area was used for target practice during the Second World War", he added.
"Undiscovered bombs can often explode without outside forces acting on them, experts say, as their detonators decompose over time".
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In an update on the matter, following another in-depth examination of the crater by the battle equipment service, it was confirmed that a world war bomb has been disposed of, the police reported.
In Germany, unexploded bombs from the World War II are still found repeatedly.
On Monday, German media was still speculating about what had caused the explosion.
Between 1940 and 1945, Allied bombers dropped almost 3 million tons of bombs on Europe.
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On Sunday, German police officers had found the explosion crater with a diameter of approximately 10 meters and a depth of around 4 meters on a crop field. Authorities confirmed that the bomb had exploded without any external trigger.
According to Hessenschau, a chemical long-term detonator triggered the explosion. The components relied on a north-south orientation after a bomb fell - with an air-powered fin that spun as the bomb descended. A construction worker died in Euskirchen in 2012 after he dug into an unexploded bomb.
Different thicknesses of discs were used - the thicker the disc, the longer the process took.
Limburg's railway depot and radio broadcast stations were a prime target for Allied bombers near the end of the war, the release said.
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A spokesman for the arms and munitions disposal service for the cities of Cologne and Düsseldorf agreed with Spyra, telling DW that unexploded bombs in the ground "will not become less unsafe over time".