An emergency search for unexploded World War Two bombs has begun at Miyazaki Airport in southwestern Japan.
It comes after a bomb believed to have been dropped by US forces during the war exploded at the airport earlier this month.
After flight operations ended on Wednesday night, work started around the shoulder of a taxiway where the explosion occurred.
A horizontal magnetic survey was conducted to detect underground metals through magnetic abnormalities.
Officials say the survey can examine objects at a depth of up to 2 meters. They plan to analyze the data they obtain to check for unexploded bombs.
The officials say probes are expected to be carried out across the airport, including the runway and other taxiways.
Authorities also plan to conduct inspections at four other airports in Sendai, Matsuyama, Fukuoka and Naha.
All five airports to be inspected, including Miyazaki, served as facilities for the now-defunct Imperial Japanese military during the war, and unexploded ordnance has been found at the sites in the past.