This is a breaking news story.

A U.S. Navy sailor from the USS Stethem has been reported missing, and the sailor is thought to be overboard in the South China Sea.

A search-and-rescue has commenced, the U.S. Pacific Fleet confirmed, according to Defense News. “The sailor was reported missing at 9 a.m. local time on Tuesday. The Japan Maritime Self-Defense Force destroyer Sazanami and helicopter carrier Izumo were assisting in search-and-rescue efforts early Wednesday morning local time, U.S. Pacific Fleet said,” according to Defense News; Joint Personnel Recovery Center Hawaii is also assisting in the search, it reported.

This is the second search-and-rescue mission in the Asia-Pacific region in the past few months.

The last search lasted for 50 hours off Okinawa, Japan, and the U.S. Navy sailor presumed missing overboard off the USS Shiloh was found a week later hiding in his ship’s engine room.

The USS Stethem is an Arleigh Burke-class destroyer based out of Yokosuka, Japan.