TOKYO (AP) — The U.S. Navy has identified an American sailor who went missing from a warship last week in Japan’s southern waters.

The Navy said on Tuesday that Peter Mims of Florida is believed to have fallen into the sea from the guided-missile cruiser USS Shiloh during routine operations Thursday about 290 kilometers (180 miles) east of Okinawa.

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The search was suspended Sunday after more than 50 hours of searching by the U.S. and Japanese navies and Japan’s coast guard failed to find him.

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The Navy said in a statement that an investigation was underway.

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Mims enlisted in 2014 and reported to the Shiloh in August that year.