US warship challenges Beijing's claim yet again, sails close to South China Sea island

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Columbia: An American warship on Sunday sailed close to a disputed island in the South China Sea occupied by Beijing, a US official said, a provocative move that could further strain relations between the superpowers.

The USS Stethem destroyer passed less than 12 nautical miles (22 kilometers) from tiny Triton Island in the Paracel Islands archipelago, which is also claimed by Taiwan and Vietnam, the official told AFP.

The operation, meant to demonstrate freedom of navigation in disputed waters, came just hours before a previously scheduled phone call between President Donald Trump and his Chinese counterpart Xi Jinping.

China did not immediately issue a response.

It was the second operation of its kind carried out by the United States since Trump took office and comes days after his administration took a number of steps that seemed sure to strain US-Chinese relations.

Trump on Thursday authorized a $1.3 billion arms sale to Taiwan, which China considers a rebel province. The same day, the US Treasury Department slapped sanctions on a Chinese bank accused of laundering North Korean cash.

Also Thursday, the State Department expressed concern about Beijing`s respect for freedom in Hong Kong, on the 20th anniversary of Britain ceding the territory back to China.

And two days earlier, the State Department placed China on a list of the world`s worst human trafficking offenders.All those steps added up to a sharp reversal in tone from April, when Xi traveled to Trump`s Mar-a-Lago resort in Florida for a first face-to-face meeting that Trump later said had helped build an "outstanding" relationship.

Further positive signs had followed, including an agreement in May on exporting US beef and natural gas to China.

Trump had praised China`s efforts to bring pressure on North Korea over its nuclear and missile programs.

But when those efforts failed to produce results -- Pyongyang conducted new missile tests in violation of UN Security Council resolutions -- the American president made his frustration known.

Those efforts had "not worked out," Trump tweeted on June 20, adding, "At least I know China tried!"

Trump is scheduled to speak with Xi on Sunday at 8:45 pm (00h45 GMT Monday), 45 minutes after speaking with Japanese Prime Minister Shinzo Abe.The latest US "freedom of navigation" exercise comes as Beijing continues muscular efforts to cement its claim to nearly all of the South China Sea, parts of which are also claimed by Taiwan and Southeast Asian nations including the Philippines, Brunei, Malaysia and Vietnam.

The United Nations says countries can establish the reach of their territorial waters up to a limit of 12 nautical miles.

China has rapidly built reefs in the area into artificial islands capable of hosting military planes.

Freedom of navigation operations are designed to challenge the sovereignty of countries with claims to disputed territory. Washington has challenged annexations of South China Sea islets while advocating for a diplomatic settlement.

On May 25, the USS Dewey guided-missile destroyer sailed less than 12 nautical miles from Mischief Reef -- part of the disputed Spratly Islands in the South China Sea, south of the Paracel Islands.

China has recently built up its facilities on Triton Island, including a new helicopter landing site, according to the Asia Maritime Transparency Initiative (AMTI), part of the Center for Strategic and International Studies think tank.

A large Chinese flag is displayed on the island, visible from aerial and satellite photos.

Beijing`s continuing construction in the area will allow Chinese planes to operate over nearly the entire South China Sea, according to the AMTI.

The United States in fiscal year 2016 conducted freedom of navigation operations "challenging excessive maritime claims of 22 different coastal states, including claims of allies and partners," the Pentagon said.