Pentagon Spokesman, Navy Comdr. William Urban, confirmed that an explosion occurred at the U.S. Army Sagami General Depot in Sagamihara City, Japan, just after midnight local time on Monday.
“There are no reports of injury, and base firefighters and first responders are currently fighting the resulting fire to prevent its spread to nearby buildings,” he said.
Urban said the cause of the explosion was under investigation.
Meanwhile, the U.S. Army in Japan said the building was not designated as a hazardous material storage facility as some initial reports indicated.
It said the depot did not store ammunition or radiological materials.