A US bomb from the second world war that had been buried at a Japanese airport has exploded, causing a large crater in a taxiway and the cancellation of more than 80 flights but no injuries, Japanese officials said.
Land and transport ministry officials said there were no aircraft nearby when the bomb exploded at Miyazaki airport in south-western Japan on Wednesday.
Officials said an investigation by the self-defence forces and police confirmed that the explosion was caused by a 500-pound US bomb and there was no further danger. They were determining what caused its sudden detonation.