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China 'seizes US vessel' in S China Sea China 'seizes US vessel' in S China Sea
(35 minutes later)
China seizes US underwater research vessel in South China Sea, US officials say The US has issued a formal request to China to deliver an unmanned underwater drone that was seized in international waters, US officials say.
This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version. The Chinese navy seized the US underwater research vessel in the South China Sea on Thursday, the US alleges.
If you want to receive Breaking News alerts via email, or on a smartphone or tablet via the BBC News App then details on how to do so are available on this help page. You can also follow @BBCBreaking on Twitter to get the latest alerts. The incident took place just as the USNS Bowditch, an oceanographic survey ship, was about to retrieve it.
The device, dubbed a "naval glider", was used to test water salinity and temperature, officials say.
The data was part of an unclassified programme to map underwater channels, the official added, speaking on condition of anonymity.
"It was taken" by China, a US official told the media.
"The UUV [unmanned underwater vehicle] was lawfully conducting a military survey in the waters of the South China Sea," the official said.
"It's a sovereign immune vessel, clearly marked in English not to be removed from the water - that it was US property."
The unnamed official added that the encounter occurred about 50 miles (80km) northwest of Subic Bay in the South China Sea.