Fukuoka, the sixth largest city in Japan, is less than two hours by car from Sasebo Naval Base. (Aaron Kidd/Stars and Stripes)

A woman found dead this week in a Fukuoka hotel room was the wife of a U.S. service member, according to Japanese police and local media reports.

The Naval Criminal Investigative Service is probing an incident involving “personnel affiliated with the U.S. Navy” at Sasebo Naval Base, 7th Fleet spokeswoman Cmdr. Megan Greene told Stars and Stripes in an email Tuesday.

“We are unable to comment further at this time due to the ongoing investigation,” she wrote.

Fukuoka Prefectural police found the woman after receiving a report at 9:20 a.m. Monday from a hotel in the city’s Chuo district, a police spokesman told Stars and Stripes by phone Tuesday.

A police news release said the woman “died unnaturally.”

The woman was an American and the wife of a U.S. service member, according to a report Tuesday from Kyushu Asahi Broadcasting Co. citing police and Sasebo Naval Base.

U.S. forces have detained the husband for questioning and Japanese police are cooperating with the U.S. investigation, the report said.

Security cameras showed a “U.S. base-related person” visiting the hotel with the woman around 7 p.m. Friday, and leaving alone Sunday morning, Kyodo News reported Tuesday, citing “investigative officials.”

Kyodo called the woman a “foreigner and wife of a U.S.-base related person.”

Police found her lying and bleeding, and said she may have been involved in a crime, the report said.

The police spokesman would not identify the hotel, but the address he provided matches Hotel SOL.

Some Japanese government officials are required to speak to the media only on condition of anonymity.