FILE PHOTO: A Chinese Coast Guard ship is seen near a Vietnam Marine Guard ship in the South China Sea about 210 km off shore of Vietnam, May 14, 2014 (REUTERS / Nguyen Minh)
Washington: China has seized an unmanned US naval underwater testing vehicle in the South China Sea, a US defense official told AFP on Friday.
"It was taken" by China, the official said, adding the craft was seized about 50 miles off Subic Bay.
The "naval glider" was used to test water salinity and temperatures to help in the mapping of underwater channels, the official said.
