"We are troubled by reports that China's Coast Guard blocked efforts by two Filipino vessels to re-supply the Philippines' outpost at Second Thomas Shoal. This is a provocative move that raises tensions," State Department spokesperson Jen Psaki said.
"Pending resolution of competing claims in the South China Sea, there should be no interference with the efforts of claimants to maintain the status quo," she said.
The Philippines has maintained a presence at Second Thomas Shoal since 1999, as other claimants have maintained a presence elsewhere in the South China Sea, she added.
"Freedom of navigation and overflight is a linchpin of security in the Pacific. Safe and unimpeded lawful commerce, freedom of navigation, stability, and respect for international law must be maintained," said the spokesperson.
