A U.S. Navy guided-missile destroyer sailed close to China's man-made islands in the disputed South China Sea on Tuesday, drawing an angry rebuke from Beijing, which said it warned and followed the American vessel.
The patrol by the USS Lassen was the most significant U.S. challenge yet to the 12-nautical-mile territorial limits China asserts around the islands in the Spratly archipelago and could ratchet up tension in one of the world's busiest shipping lanes.
One U.S. defense official said the USS Lassen sailed within 12 nautical miles of Subi Reef. A second defense official said the mission, which lasted a few hours, included Mischief Reef and would be the first in a series of freedom-of-navigation exercises aimed at testing China's territorial claims.
China's Foreign Ministry said the "relevant authorities" monitored, followed and warned the USS Lassen as it "illegally" entered waters near islands and reefs in the Spratlys without the Chinese government's permission.
"China will resolutely respond to any country's deliberate provocations," the ministry said in a statement that gave no details on precisely where the U.S. ship sailed.
Foreign Ministry spokesman Lu Kang later told a daily briefing that if the United States continued to "create tensions in the region," China might conclude it had to "increase and strengthen the building up of our relevant abilities".
Lu did not elaborate, except to say he hoped it did not come to that, but his comments suggested China could further boost its military presence in the South China Sea.
"China hopes to use peaceful means to resolve all the disputes, but if China has to make a response then the timing, method and tempo of the response will be made in accordance with China's wishes and needs."
The second U.S. defense official said additional patrols would follow in coming weeks and could be conducted around features that Vietnam and the Philippines have built up in the Spratlys.
"This is something that will be a regular occurrence, not a one-off event," said the official. "It's not something that's unique to China."
White House spokesman Josh Earnest referred questions on any specific operations to the Pentagon but said the United States had made clear to China the importance of free flow of commerce in the South China Sea.
The U.S. Navy last went within 12 miles of Chinese-claimed territory in the Spratlys in 2012.
China claims most of the South China Sea, through which more than $5 trillion of world trade passes every year. Vietnam, Malaysia, Brunei, the Philippines and Taiwan have rival claims.
The Philippines, a vocal critic of China's activities in the South China Sea, welcomed the U.S. action.
"The American passage through these contentious waters is meant precisely to say that there are norms as to what freedom-of-navigation entails and they intend to exercise so there is no de facto changing of the reality on the ground," President Benigno Aquino told reporters.
RISK OF ESCALATION
The decision to go ahead with the patrol follows months of deliberation and it risk upsetting already strained ties with China.
"By using a guided-missile destroyer, rather than smaller vessels ... they are sending a strong message," said Ian Storey, a South China Sea expert at Singapore's Institute of South East Asian Studies.
