A brush fire at the U.S. military's Camp Hansen in Okinawa burned for 41 hours before it was put out Wednesday morning, the U.S. Marine Corps in Japan said.
The U.S. Marines said the fire started when an unexploded ordnance spontaneously ignited, adding that the cause of the ignition is being investigated.
There were no casualties or property damage as a result of the fire, it said.
"Explosive Ordnance personnel were conducting a routine search and disposal of unexploded ordinance at the time" the fire started, the marines said in a press release.