Japanese authorities plan to begin a search for unexploded World War Two bombs at Miyazaki Airport in southwestern Japan next week.
The emergency probe comes after a bomb believed to have been dropped by US forces during the war exploded last week at the airport on the shoulder of a taxiway.
No one was injured, although a commercial plane had passed near the spot minutes before the blast.
The search for more unexploded bombs is due to start on October 16, initially focusing on the area close to where the explosion occurred. Transport authorities plan to conduct a magnetic field survey to detect metals up to a depth of around two meters.
A survey of runway, taxiway, landing zone, tarmac and other areas will start at a later date. A different inspection method is being considered, since some of these areas are covered with thick asphalt.
Authorities also plan to conduct emergency inspections at four other airports — from Sendai in the northeast to Matsuyama, Fukuoka and Naha in the southwest. All served as facilities for the now-defunct Imperial Japanese military during the war, and unexploded ordnances have been found at the sites in the past.