"We, as a nation, should be alarmed by China's militarization of the WPS (West Philippine Sea)".
Despite the Philippines' mended ties with China, Beijing has continued to assert its extensive claims to the disputed waterway.
Citing the "very close and long alliance" of the United States and the Philippines, which are bound by a 1951 Mutual Defence Treaty, Felter also said, "We remain unwaveringly committed to supporting our close treaty ally, the Philippines".
Duterte also pinned the blame on Aquino.
However, Panganiban (Mischief) Reef is not disputed as the United Nations-backed Permanent Court of Arbitration ruled in July 2016 that the Philippines has sovereign rights over it. "We will continue carrying out our operations", he said. "Why did they not go and call their attention?" It claims nearly all of South China Sea.
Pentagon chief spokeswoman Dana White underscored Sanders' statement as well as highlighting the United States' commitment to the freedom of navigation in worldwide waters.More news: Russian Federation probe: Trump hires Bill Clinton's impeachment lawyer to replace Ty Cobb
The reports said the missiles were moved to Fiery Cross Reef, Subi Reef and within the past 30 days.
"We're taking it seriously. Every and all diplomatic action to protect our interest", Cayetano told reporters.
The spokeswoman for the Chinese Foreign Ministry, questioned on Thursday, did not confirm or deny the deployment. Its Foreign Ministry said China has irrefutable sovereignty over the Spratlys and that necessary defensive deployments were for national security needs and not aimed at any country.
"Those who don't intend to violate (this sovereignty) have no reason to worry", she said.
Filipino critics of Duterte, however, said that he has abdicated his responsibility to defend the sovereignty of the country by not acting on Chinese "incursions".
Amid reports of the deployment of a Chinese missile system on the disputed Islands in the South China sea, the White house has warned Beijing about the consequences of the militarization of the region.More news: Press Freedom Day being observed today
Over the last week, Beijing has conducted major military drills, including reportedly sending its aircraft carrier through the Taiwan Strait and flying jets between Japan's southernmost islands (the latter of which was explicitly described by the Chinese military as a preparation for future wars). It said the HQ-9B long-range, surface-to-air missiles could target aircraft, drones and cruise missiles within 160 nautical miles. "This is a trap", Alejano said.
The sources said United States intelligence assessments found the missiles were moved to Fiery Cross Reef, Subi Reef and Mischief Reef in the Spratly Islands within the past 30 days.
"The distance is as good as the distance between Quezon City to Taguig City". "We demand immediate withdrawal of the missiles and the dismantling of Chinese bases in Philippine territories".
Since becoming president of the Philippines in June 2016, Duterte has been eager to fix relations with Beijing.
"We should also consider joint exploration and use starting with confidence-building measures for which we have historical model with China and Vietnam", he said referring to the Joint Maritime Seismic Understanding during the time of President Gloria Macapagal Arroyo.More news: Trump nominated for Nobel Peace Prize by House Republicans
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