Sailors battled a fire aboard the amphibious transport dock ship USS New Orleans for about 12 hours before the blaze was finally extinguished early Thursday morning in Japan, Navy officials have announced.

Two sailors were treated aboard the New Orleans for minor injuries, a news release from the Navy’s 7th Fleet says.

No information was immediately available about the extent of damage to the ship.

An investigation into the cause of the fire is underway, the Navy said in a statement.

The fire broke out about 4 p.m. local time on Wednesday as the New Orleans was anchored near White Beach Naval Facility, Okinawa, the news release says. The blaze was declared extinguished at 4 a.m. on Thursday.

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