A British World War II bomb exploded while being made safe underwater by navy demolition specialists in northwestern Poland on Tuesday.
No one was hurt in the operation, which the Polish military forces said they considered a success because the munition, a British “Tallboy” bomb, had ultimately been destroyed.
Poland has been clearing explosive remnants of war from its territory since the end of World War II, according to experts with the International Committee of the Red Cross.
The Defense Ministry also said the operation was the first attempt to neutralize a Tallboy bomb underwater.
The authors credit Tallboy bombs with sinking the German battleship Tirpitz off northern Norway in November 1944.