The fire that broke out aboard the US Navy amphibious warship USS New Orleans off the coast of Japan has been put out after hours, a defense official told Business Insider. Navy sailors from the New Orleans and supporting USS San Diego had been battling the blaze since Wednesday evening local time.

Crews have been responding to the fire, a Navy spokesperson told Business Insider. The cause of the fire and the extent of the damage are currently unknown. A fire broke out aboard the US Navy amphibious warship USS New Orleans off the coast of Japan on Wednesday evening.

Sailors from the USS New Orleans and USS San Diego battled the blaze with help from Japan’s Maritime Self-Defense Force and Coast Guard.