Tokyo: An early-morning explosion at Miyazaki Airport in southwest Japan damaged a portion of the taxiway, prompting the closure of one runway, according to local media on Wednesday.
A blast was heard on the taxiway shortly before 8 a.m. local time on Wednesday as air traffic controllers saw smoke rising from the site, public broadcaster NHK reported, citing a transport ministry office at Miyazaki Airport, IANS reported.
Camera footage showed the blast sent fragments of the pavement and dust clouds into the air, with the hole made by the blast measuring about 7 meters long, 4 meters wide and one meter deep, according to NHK.
No one was injured and airlines said they have cancelled a total of 66 flights for Wednesday, Xinhua news agency reported quoting public broadcaster NHK.
Japan's Chief Cabinet Secretary Hayashi Yoshimasa told reporters on Wednesday afternoon that the blast was caused by a US-made bomb, assuring that there is no risk of a second explosion.
Unexploded bombs dropped by US forces during World War II have often been found at the airport.
Airport officials planned to refill the hole and resume operations on Thursday morning.