A Chinese Navy warship has seized an underwater drone deployed by an American oceanographic vessel in international waters in the South China Sea,triggering a formal diplomatic protest from the United States and a demand for its return, a U.S. defense official told Reuters on Friday.

The incident, the first of its kind in recent memory, took place on Dec. 15 northwest of Subic Bay off the Philippines just as the USNS Bowditch, an oceanographic survey ship, was about to retrieve the unmanned, underwater vehicle (UUV), the official said, speaking on condition of anonymity.

“The UUV 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 U.S. property.”

The US asked China to “immediately” return its unmanned naval probe in international waters in the South China Sea which it alleged has been “unlawfully” seized by them. “Using appropriate government-to-government channels, the Department of Defense has called upon China to immediately return an unmanned underwater vehicle (UUV) that China unlawfully seized on December 15 in the South China Sea while it was being recovered by a US Navy oceanographic survey ship,” Pentagon Press Secretary Peter Cook said.

The Chinese seizure will add to concerns about China's growing military presence and aggressive posture in the disputed South China Sea, including its militarisation of maritime outposts.

A U.S. think tank reported this week that new satellite imagery indicated that China has installed weapons, including anti-aircraft and anti-missile systems, on all seven artificial islands it has built in the South China Sea.

The seized underwater drone was part of an unclassified program to collect oceanographic data, including salinity,temperature and clarity of the water, the official added.

Such data can help inform U.S. military sonar data, since sound is affected by such factors.

The United States issued the formal demarche, as such protests are known, through diplomatic channels and included a demand that China immediately return the underwater drone.

The Chinese have acknowledged the demarche but not responded to it, the official added. </s> The Chinese government has returned the US unmanned underwater drone it seized last week in the South China Sea, according to Chinese and US officials.

"After friendly consultations between China and the United States, the transfer of the US underwater drone was smoothly completed," a statement from the Chinese Ministry of Defense said.

The Pentagon said the United States would continue to investigate the events surrounding the incident.

Developing story - more to come </s> WASHINGTON - A Chinese Navy warship has seized an underwater drone deployed by an American oceanographic vessel in international waters in the South China Sea, triggering a formal diplomatic protest from the United States and a demand for its return, a U.S. defense official told Reuters on Friday.

The incident, the first of its kind in recent memory, took place on Dec. 15 northwest of Subic Bay off the Philippines just as the USNS Bowditch, an oceanographic survey ship, was about to retrieve the unmanned, underwater vehicle (UUV), the official said, speaking on condition of anonymity.

"The UUV 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 U.S. property."

The Chinese seizure will add to concerns about China's growing military presence and aggressive posture in the disputed South China Sea, including its militarization of maritime outposts.

A U.S. think tank reported this week that new satellite imagery indicated that China has installed weapons, including anti-aircraft and anti-missile systems, on all seven artificial islands it has built in the South China Sea.

The seized underwater drone was part of an unclassified program to collect oceanographic data, including salinity, temperature and clarity of the water, the official added.

Such data can help inform U.S. military sonar data, since sound is affected by such factors.

The United States issued the formal demarche, as such protests are known, through diplomatic channels and included a demand that China immediately return the underwater drone.

The Chinese have acknowledged the demarche but not responded to it, the official added. (Reporting by Phil Stewart; Editing by Chizu Nomiyama and James Dalgleish) </s> A Chinese Navy warship has seized an underwater drone deployed by an American oceanographic vessel in international waters in the South China Sea, triggering a formal diplomatic protest from the United States and a demand for its return, a U.S. defense official told Reuters on Friday.

The incident, the first of its kind in recent memory, took place on Dec. 15 northwest of Subic Bay off the Philippines just as the USNS Bowditch, an oceanographic survey ship, was about to retrieve the unmanned, underwater vehicle (UUV), the official said, speaking on condition of anonymity.

“The UUV 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 U.S. property.”

The Chinese seizure will add to concerns about China’s growing military presence and aggressive posture in the disputed South China Sea, including its militarization of maritime outposts.

A U.S. think tank reported this week that new satellite imagery indicated that China has installed weapons, including anti-aircraft and anti-missile systems, on all seven artificial islands it has built in the South China Sea.

The seized underwater drone was part of an unclassified program to collect oceanographic data, including salinity, temperature and clarity of the water, the official added.

Such data can help inform U.S. military sonar data, since sound is affected by such factors.

The United States issued the formal demarche, as such protests are known, through diplomatic channels and included a demand that China immediately return the underwater drone.

The Chinese have acknowledged the demarche but not responded to it, the official added. </s> The United States expects China to return an underwater drone "relatively soon" after a Chinese naval vessel seized it in the South China Sea last week, triggering U.S. protests, two U.S. defense officials told Reuters on Monday.

One scenario saw a U.S. Navy destroyer receiving the drone from China at an agreed upon location in the South China Sea, one of the officials said. Both officials, who spoke on condition of anonymity, said talks with China were progressing.

The Pentagon says the unmanned, underwater vehicle (UUV) used unclassified, commercially available technology to collect scientific data about things like the salinity, temperature and clarity of the water. </s> China has returned a U.S. underwater drone taken by one of its naval vessels in the disputed South China Sea last week after what it said were friendly talks with the United States, which reiterated its criticism of the “unlawful” seizure.

The taking of the unmanned underwater vehicle in international waters near the Philippines triggered a diplomatic protest and speculation about whether it would strengthen U.S. President-elect Donald Trump’s hand as he seeks a tougher line with China.

Read also: Is China prepared for a thaw in U.S.-Russia relations?

Read more: China says it seized U.S. drone to ensure safety of ships

A Chinese naval ship took the drone, which the Pentagon says uses unclassified, commercially available technology to collect oceanographic data, on Thursday about 50 nautical miles northwest of Subic Bay in the Philippines.

China’s defense ministry said in a brief statement the drone had been given back to the United States on Tuesday.

“After friendly consultations between the Chinese and U.S. sides, the handover work for the U.S. underwater drone was smoothly completed in relevant waters in the South China Sea at midday,” the ministry said.

The defense ministry declined to give more details about the handover when contacted by Reuters.

The Pentagon said the vehicle had been handed over to the guided missile destroyer USS Mustin near where it had been “unlawfully seized”. It called on China to comply with international law and refrain from further efforts to impede lawful U.S. activities.

“The U.S. remains committed to upholding the accepted principles and norms of international law and freedom of navigation and overflight and will continue to fly, sail, and operate in the South China Sea wherever international law allows,” Pentagon Press Secretary Peter Cook said in a statement.

Chinese foreign ministry spokeswoman Hua Chunying referred questions about the handover and other details of the case to the defense ministry.

“The handling of this incident shows that the Chinese and U.S. militaries have quite smooth communication channels. We think that this communication channel is beneficial to timely communication and the handling of sudden incidents and prevention of miscalculations and misunderstandings,” she said.

“As to what the U.S. defense department said, I have to verify it with the military. But I think what they said is unreasonable as we have always said that for a long time the U.S. military has regularly sent ships and aircraft to carry out close up surveillance and military surveys in waters facing China, which threatens China’s sovereignty and security,” Hua told reporters.

“China is resolutely opposed to this and has always demanded the U.S. end these kinds of activities. I think this is the cause of this or similar incidents.”

The seizure has added to U.S. concern about China’s growing military presence and aggressive posture in the disputed South China Sea, including its militarization of maritime outposts.

China is deeply suspicious of any U.S. military activity in the resource-rich South China Sea, with state media and experts saying the use of the drone was likely part of U.S. surveillance efforts in the disputed waterway.

The U.S. Navy has about 130 such underwater drones, made by Teledyne Webb, each weighing about 60 kg (130 lb) and able to stay underwater for up to five months. They are used around the world to collect unclassified data about oceans, including temperature and depth.

It is not clear how many are used in the South China Sea. </s> China has returned a U.S. underwater drone taken by one of its naval vessels in the disputed South China Sea last week after what it said were friendly talks with the United States, which reiterated its criticism of the “unlawful” seizure.

The taking of the unmanned underwater vehicle in international waters near the Philippines triggered a diplomatic protest and speculation about whether it would strengthen U.S. President-elect Donald Trump’s hand as he seeks a tougher line with China.

A Chinese naval ship took the drone, which the Pentagon says uses unclassified, commercially available technology to collect oceanographic data, on Thursday about 50 nautical miles northwest of Subic Bay in the Philippines.

China’s defence ministry said in a brief statement the drone had been given back to the United States on Tuesday. “After friendly consultations between the Chinese and U.S. sides, the handover work for the U.S. underwater drone was smoothly completed in relevant waters in the South China Sea at midday,” the ministry said.

The Pentagon said the vehicle had been handed over to the guided missile destroyer USS Mustin near where it had been”unlawfully seized”.

It also called on China to comply with international law and refrain from further efforts to impede lawful U.S. activities. — Reuters </s> The seized drone was deployed by an American oceanographic vessel. (Photo: Twitter)

Washington: A Chinese Navy warship has seized an underwater drone deployed by an American oceanographic vessel in international waters in the South China Sea, triggering a formal diplomatic protest from the United States and a demand for its return, a US defense official told Reuters on Friday.

The incident, the first of its kind in recent memory, took place on December 15 north-west of Subic Bay off the Philippines just as the USNS Bowditch, an oceanographic survey ship, was about to retrieve the unmanned, underwater vehicle (UUV), the official said, speaking on condition of anonymity.

"The UUV 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 Chinese seizure will add to concerns about China's growing military presence and aggressive posture in the disputed South China Sea, including its militarization of maritime outposts.

A US think tank reported this week that new satellite imagery indicated that China has installed weapons, including anti-aircraft and anti-missile systems, on all seven artificial islands it has built in the South China Sea.

The seized underwater drone was part of an unclassified program to collect oceanographic data, including salinity, temperature and clarity of the water, the official added.

Such data can help inform US military sonar data, since sound is affected by such factors.

The United States issued the formal demarche, as such protests are known, through diplomatic channels and included a demand that China immediately return the underwater drone.

The Chinese have acknowledged the demarche but not responded to it, the official added. </s> China has returned a US underwater drone taken by one of its naval vessels in the disputed South China Sea last week after what it said were friendly talks with the United States. However, the US reiterated its criticism of the “unlawful” seizure.

The taking of the unmanned underwater vehicle in international waters near the Philippines triggered a diplomatic protest and speculation about whether it would strengthen US president-elect Donald Trump’s hand as he seeks a tougher line with China.

A Chinese naval ship took the drone, which the Pentagon says uses unclassified, commercially available technology to collect oceanographic data, on Thursday about 50 nautical miles northwest of Subic Bay in the Philippines.

China’s defence ministry said in a brief statement that the drone had been given back to the United States on Tuesday.

“After friendly consultations between the Chinese and US sides, the handover work for the US underwater drone was smoothly completed in relevant waters in the South China Sea at midday,” the ministry said.

The defence ministry declined to give more details about the handover.

The Pentagon said the vehicle had been handed over to the guided missile destroyer USS Mustin near where it had been “unlawfully seized”. It called on China to comply with international law and refrain from further efforts to impede lawful US activities.

“The US remains committed to upholding the accepted principles and norms of international law and freedom of navigation and overflight and will continue to fly, sail and operate in the South China Sea wherever international law allows,” Pentagon press secretary Peter Cook said in a statement.

Chinese foreign ministry spokeswoman Hua Chunying referred questions about the handover and other details of the case to the defence ministry.

“The handling of this incident shows that the Chinese and US militaries have quite smooth communication channels. We think that this communication channel is beneficial to timely communication and the handling of sudden incidents and prevention of miscalculations and misunderstandings,” she said.

“As to what the US defence department said, I have to verify it with the military. But I think what they said is unreasonable as we have always said that for a long time the US military has regularly sent ships and aircraft to carry out close-up surveillance and military surveys in waters facing China, which threatens China’s sovereignty and security.

“China is resolutely opposed to this and has always demanded the US end these kinds of activities. I think this is the cause of this or similar incidents.”

The seizure has added to US concern about China’s growing military presence and aggressive posture in the disputed South China Sea, including its militarisation of maritime outposts.

China is deeply suspicious of any US military activity in the resource-rich South China Sea, with state media and experts saying the use of the drone was likely part of US surveillance efforts in the disputed waterway.
The Chinese Defense Ministry says it is in talks with the United States about returning an underwater drone taken Thursday from the South China Sea. The Pentagon says the drone, used for gathering weather and temperature data, is not armed.