A World War II bomb exploded at a construction site near town in western Germany, killing a man and wounding eight others on Friday.
A digger struck the device during excavation work in Euskirchen in the state of North Rhine-Westphalia.
The DPA news agency reports the machine operator died on the spot. Two others were critically wounded.
Police said the blast impact could be felt 1km away.
The incident took place around 1.30pm local time in an industrial park. The windows of nearby houses and cars were smashed.
A BBC correspondent said unexploded bombs are still regularly discovered in Germany, particularly in the industrial areas.