Controlled Detonation of WWII Bomb in Hanau Causes Unexpected Damage to Residences

A controlled detonation of a 250-kilogram World War II bomb in Hanau, Germany, resulted in significant damage to nearby apartments despite extensive safety preparations. The bomb, initially mistaken for a phosphor bomb, was later found to be filled with explosives, not incendiary material as believed. This unexpected content heightened the blast's impact, breaking numerous windows and damaging roofs in the vicinity.

Authorities attempted to defuse the bomb, but it could not be safely disarmed due to a defective detonator, making controlled detonation the necessary final step. Safety measures included constructing a protective barrier using 15 water-filled sea containers to mitigate the blast; however, the explosion's force still caused damage to 28 apartments, with shattered balcony doors and glass scattered throughout, as recounted by residents such as 68-year-old Martina Hofmann who lived just 15 meters from the site.

Fortunately, no injuries were reported, and residents were able to return home swiftly. The city of Hanau and the state of Hesse have pledged to cover all damages resulting from the blast. Matthias Schieder, spokesman for the bomb disposal unit, explained that such detonations occur only when defusing is impossible, noting this was the second similar incident in Hanau in 2025. Despite the damage, he emphasized that the impact was less severe than initially feared, thanks to the precautionary steps taken.

German authorities frequently encounter unexploded ordnance from World War II and regularly apply strict protocols for their disposal, balancing the need for public safety with minimizing disruption and damage. This event underscores difficulties faced when ordnance contents are not as expected, complicating disposal efforts and raising risks for nearby residents. Even with advanced safety measures, unforeseen bomb characteristics can lead to unexpected consequences during disposal operations.