The top diplomats of China and the US sparred on Saturday over the South China Sea, where Beijing is locked in a territorial dispute with US treaty ally the Philippines. Secretary of State Antony Blinken and Chinese foreign minister Wang Yi met on the sidelines of a foreign ministers meeting of the Association of Southeast Asian Nations (ASEAN) in Laos. The US hailed the meeting as "open and productive," after Blinken had criticised Beijing's "escalatory and unlawful actions" in the South China Sea.

Chinese and Filipino ships have clashed in the waterway, fuelling fears of a conflict that could drag in the US due to its mutual defence treaty with Manila. The US should "refrain from fanning the flames, stirring up trouble and undermining stability at sea," Wang said at the meeting, according to a foreign ministry statement. "The risks and challenges facing China-US relations are still rising," he said.

Blinken also raised "US concerns about provocative actions" by China, including a simulated blockade of Taiwan following the May inauguration of President Lai Ching-te. China claims the democratic island as its territory and slammed Lai's inauguration speech as "confession of independence." "Whenever the promoters of Taiwanese independence will make a provocation, we will respond with a countermeasure," Wang said, according to Beijing's foreign ministry.

During the meeting, which a State Department official said lasted one hour and twenty minutes, Blinken also raised US concerns.