Explosion rocks US military base in Japan

The explosion occurred at the US Army Sagami General Depot in Sagamihara City, approximately 25 miles southwest of Tokyo, according to a statement from Pentagon spokesman US Navy Commander William Urban.
"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," Urban said.
The US Army in Japan said the building was "not designated as ahazardous material storage facility as some initial reports indicated."
It added that the depot "does not store ammunition or radiological materials."
The cause of the explosion remains under investigation.